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1、Unit 5 The power of nature Period3Period3Learning about LanguageStep1 Discover useful words and expressions1. Watch the video of an episode of Vesuvius eruption.2. Look at some pictures of Vesuvius volcano and learn about it. This mountain has erupted more than 50 times since the eruption in 79 AD,

2、when it buried Pompeii and its sister city, Herculaneum. After Pompeii was buried and lost to history, the volcano continued to erupt every 100 years until about 1037 A.D., when it entered a 600-year period of quiescence. In 1631, the volcano killed an additional 4000 unsuspecting inhabitants. Mount

3、 Vesuvius 1. Complete the text with the words below in their proper forms.The eruption of Mount Vesuvius in 79 AD took People in Pompeii by surprise. It was so quick and so severe that the town was soon covered in _ and _. Many houses in the town were _. It was an _ disaster for many people who coul

4、d not get away in time. A writerashlavaburned to the groundabsoluteNamed Pliny, who was there during the _, described how lava was thrown into the air like a _._ many of the townspeople, _ at the _ sight of Vesuvius eruption, stayed too long and failed to escape in time.eruptionfountainUnfortunately

5、amazedfantastic2. Find suitable words or expressions from the texts in the unit so far to fill in the blanks.1) I went to a tea house with two friends last weekend but all they talked about was volcanoes. I was so _ that I fell asleep.2). A tourist very foolishly took a risk by walking right to the

6、edge of an active _.boredvolcano3). I carefully _ over the fallen rocks and returned to the car.made my way4). Nothing can _ the experience of standing close to an active volcano for the first time.Compare with5). Can volcanologists predict when a volcano will _?erupt6). The sight of hot lava enteri

7、ng the sea at dawn was _.impressiveStep2 Grammar v-ing 的一般式的一般式和完成式和完成式1. Watch a flash . From the flash we can review the differences between v-ing and the past participle.a. 現(xiàn)在分詞表示主動(dòng)現(xiàn)在分詞表示主動(dòng), 過去分詞表示被動(dòng)過去分詞表示被動(dòng).b. 現(xiàn)在分詞表示進(jìn)行中的動(dòng)作現(xiàn)在分詞表示進(jìn)行中的動(dòng)作, 過去分詞過去分詞表示動(dòng)作已完成表示動(dòng)作已完成.2. Change the following sentences int

8、o v-ing form.1). I was feeling tired. I went to bed early.改成改成:Feeling tired, I went to bed early.相當(dāng)于相當(dāng)于: As I felt tired, I went to bed early.2) I worked hard all day. I went to bed early.改成改成:Having worked hard all day, I went to bed early.相當(dāng)于相當(dāng)于: After I worked hard all day, I went to bed early.可

9、以看出可以看出:a. 分詞的一般式說明分詞的動(dòng)作與主句分詞的一般式說明分詞的動(dòng)作與主句的謂語動(dòng)詞的動(dòng)作是同時(shí)發(fā)生的的謂語動(dòng)詞的動(dòng)作是同時(shí)發(fā)生的.b. 分詞的完成式說明分詞的動(dòng)作發(fā)分詞的完成式說明分詞的動(dòng)作發(fā)生在主句謂語動(dòng)詞的動(dòng)作之前生在主句謂語動(dòng)詞的動(dòng)作之前.鞏固練習(xí)：鞏固練習(xí)：現(xiàn)在分詞的一般式和完成現(xiàn)在分詞的一般式和完成式之間進(jìn)行互換。式之間進(jìn)行互換。1). Studying volcanoes, I am amazed at their beauty as well as their potential to cause great damage.改成改成:Having studied v

10、olcanoes for twenty years, I am still amazed at their beauty as well as their potential to cause great damage.2). Having stood for several minutes, I saw some of my friends chatting at a table.改成改成:Arriving there, I saw some of my friends chatting at a table.3). Writing the letter, he left out somet

11、hing important.改成改成:Having written the letter, he read it carefully.3. 用分詞改寫句子用分詞改寫句子:1) As I didnt know how to find the subway, I called a policeman for help.改成改成:Not knowing how to find the subway, I called a policeman for help.2) She didnt receive her fathers reply, so she wrote a letter again.改成

12、改成:Not having received her fathers reply, she wrote a letter again.可以看出可以看出: 分詞的否定式是在分詞前面分詞的否定式是在分詞前面加上否定詞加上否定詞not.4. 小結(jié)小結(jié)-ing 形式的形式的用法用法1. ing 形式作狀語形式作狀語用法用法例句例句時(shí)間時(shí)間 Seeing those pictures, she remembered her childhood. (= When she saw those pictures)用法用法例句例句原因原因 Being tired, I stopped to take a res

13、t.(= Because I was tired, .)條件條件 Standing at the foot of a high mountain, you will find yourself very small. (= If you stand at the foot of a high mountain, .)用法用法例句例句讓步讓步 Knowing where I live, he never comes to see me .(= Though he knows where I live, .)用法用法例句例句伴隨伴隨 They stood there, watching the s

14、tars in the sky. (= , and watched the stars in the sky.)結(jié)果結(jié)果 She was so angry that she threw the toy on the ground, breaking it into pieces.(=, and broke it into pieces.)2. ing形式的完成式形式的完成式句句型型主主動(dòng)動(dòng)Having +p.p. , 主語主語+謂語謂語Having finished my work, I went home. (= After I had finished my work, .)被被動(dòng)動(dòng)(Ha

15、ving been) +p.p. , 主語主語+謂語謂語(Having been) written in haste, the book has some faults.用法用法 ing形式的完成式所表示的時(shí)間在謂形式的完成式所表示的時(shí)間在謂語動(dòng)詞之前語動(dòng)詞之前3. Ing形式的否定式形式的否定式Ing 一般式一般式的否定式的否定式Not +v-ing, Not knowing how to find the subway, I asked a policeman for help. Ing 完成式完成式的否定式的否定式Not +having doneNot having experience

16、d an earthquake before, I was frightened. 5. 使用使用- ing形式需注意的問題。形式需注意的問題。分詞分詞 (短語短語) 作狀語時(shí)作狀語時(shí), 其邏輯主語必須其邏輯主語必須與句子的主語一致。與句子的主語一致。如果不一致，必須如果不一致，必須用獨(dú)立主格結(jié)構(gòu)來表示，也就是在分詞用獨(dú)立主格結(jié)構(gòu)來表示，也就是在分詞前面加上它的邏輯主語。前面加上它的邏輯主語。 The train having gone, we had to wait another day.（the train邏輯主語邏輯主語 + having gone 即為獨(dú)立主格結(jié)構(gòu)）即為獨(dú)立主格結(jié)構(gòu)）

17、Weather permitting, we will go for a picnic tomorrow. （weather邏輯主語邏輯主語 + doing 即為獨(dú)立主格結(jié)構(gòu)即為獨(dú)立主格結(jié)構(gòu). 6. Watch a flash.鞏固鞏固v-ing形式作狀語以及獨(dú)立主格結(jié)構(gòu)形式作狀語以及獨(dú)立主格結(jié)構(gòu).7. Find in the text the sentences with v-ing forms or the perfect ing form.8. Finish Exercise3, 4, 5, 6 on page36 and page 37.1. 完成完成Workbook P71,72的練

18、習(xí)的練習(xí).Homework2. Make up a dialogue according to the situation: Your group go to a volcano to collect a sample of boiling lava, take measurement in the crater and fly over a volcano to make a map of the direction of the lava. You will meet a lot of difficulties and have to overcome them.Period3Period

19、3Learning about LanguageStep1 Discover useful words and expressions1. Watch the video of an episode of Vesuvius eruption.2. Look at some pictures of Vesuvius volcano and learn about it. This mountain has erupted more than 50 times since the eruption in 79 AD, when it buried Pompeii and its sister ci

20、ty, Herculaneum. After Pompeii was buried and lost to history, the volcano continued to erupt every 100 years until about 1037 A.D., when it entered a 600-year period of quiescence. In 1631, the volcano killed an additional 4000 unsuspecting inhabitants. Mount Vesuvius 1. Complete the text with the

21、words below in their proper forms.The eruption of Mount Vesuvius in 79 AD took People in Pompeii by surprise. It was so quick and so severe that the town was soon covered in _ and _. Many houses in the town were _. It was an _ disaster for many people who could not get away in time. A writerashlavab

22、urned to the groundabsoluteNamed Pliny, who was there during the _, described how lava was thrown into the air like a _._ many of the townspeople, _ at the _ sight of Vesuvius eruption, stayed too long and failed to escape in time.eruptionfountainUnfortunatelyamazedfantastic2. Find suitable words or

23、 expressions from the texts in the unit so far to fill in the blanks.1) I went to a tea house with two friends last weekend but all they talked about was volcanoes. I was so _ that I fell asleep.2). A tourist very foolishly took a risk by walking right to the edge of an active _.boredvolcano3). I ca

24、refully _ over the fallen rocks and returned to the car.made my way4). Nothing can _ the experience of standing close to an active volcano for the first time.Compare with5). Can volcanologists predict when a volcano will _?erupt6). The sight of hot lava entering the sea at dawn was _.impressiveStep2

25、 Grammar v-ing 的一般式的一般式和完成式和完成式1. Watch a flash . From the flash we can review the differences between v-ing and the past participle.a. 現(xiàn)在分詞表示主動(dòng)現(xiàn)在分詞表示主動(dòng), 過去分詞表示被動(dòng)過去分詞表示被動(dòng).b. 現(xiàn)在分詞表示進(jìn)行中的動(dòng)作現(xiàn)在分詞表示進(jìn)行中的動(dòng)作, 過去分詞過去分詞表示動(dòng)作已完成表示動(dòng)作已完成.2. Change the following sentences into v-ing form.1). I was feeling tired. I

26、went to bed early.改成改成:Feeling tired, I went to bed early.相當(dāng)于相當(dāng)于: As I felt tired, I went to bed early.2) I worked hard all day. I went to bed early.改成改成:Having worked hard all day, I went to bed early.相當(dāng)于相當(dāng)于: After I worked hard all day, I went to bed early.可以看出可以看出:a. 分詞的一般式說明分詞的動(dòng)作與主句分詞的一般式說明分詞的動(dòng)作

27、與主句的謂語動(dòng)詞的動(dòng)作是同時(shí)發(fā)生的的謂語動(dòng)詞的動(dòng)作是同時(shí)發(fā)生的.b. 分詞的完成式說明分詞的動(dòng)作發(fā)分詞的完成式說明分詞的動(dòng)作發(fā)生在主句謂語動(dòng)詞的動(dòng)作之前生在主句謂語動(dòng)詞的動(dòng)作之前.鞏固練習(xí)：鞏固練習(xí)：現(xiàn)在分詞的一般式和完成現(xiàn)在分詞的一般式和完成式之間進(jìn)行互換。式之間進(jìn)行互換。1). Studying volcanoes, I am amazed at their beauty as well as their potential to cause great damage.改成改成:Having studied volcanoes for twenty years, I am still am

28、azed at their beauty as well as their potential to cause great damage.2). Having stood for several minutes, I saw some of my friends chatting at a table.改成改成:Arriving there, I saw some of my friends chatting at a table.3). Writing the letter, he left out something important.改成改成:Having written the l

29、etter, he read it carefully.3. 用分詞改寫句子用分詞改寫句子:1) As I didnt know how to find the subway, I called a policeman for help.改成改成:Not knowing how to find the subway, I called a policeman for help.2) She didnt receive her fathers reply, so she wrote a letter again.改成改成:Not having received her fathers reply

30、, she wrote a letter again.可以看出可以看出: 分詞的否定式是在分詞前面分詞的否定式是在分詞前面加上否定詞加上否定詞not.4. 小結(jié)小結(jié)-ing 形式的形式的用法用法1. ing 形式作狀語形式作狀語用法用法例句例句時(shí)間時(shí)間 Seeing those pictures, she remembered her childhood. (= When she saw those pictures)用法用法例句例句原因原因 Being tired, I stopped to take a rest.(= Because I was tired, .)條件條件 Standin

31、g at the foot of a high mountain, you will find yourself very small. (= If you stand at the foot of a high mountain, .)用法用法例句例句讓步讓步 Knowing where I live, he never comes to see me .(= Though he knows where I live, .)用法用法例句例句伴隨伴隨 They stood there, watching the stars in the sky. (= , and watched the st

32、ars in the sky.)結(jié)果結(jié)果 She was so angry that she threw the toy on the ground, breaking it into pieces.(=, and broke it into pieces.)2. ing形式的完成式形式的完成式句句型型主主動(dòng)動(dòng)Having +p.p. , 主語主語+謂語謂語Having finished my work, I went home. (= After I had finished my work, .)被被動(dòng)動(dòng)(Having been) +p.p. , 主語主語+謂語謂語(Having been

33、) written in haste, the book has some faults.用法用法 ing形式的完成式所表示的時(shí)間在謂形式的完成式所表示的時(shí)間在謂語動(dòng)詞之前語動(dòng)詞之前3. Ing形式的否定式形式的否定式Ing 一般式一般式的否定式的否定式Not +v-ing, Not knowing how to find the subway, I asked a policeman for help. Ing 完成式完成式的否定式的否定式Not +having doneNot having experienced an earthquake before, I was frightened

34、. 5. 使用使用- ing形式需注意的問題。形式需注意的問題。分詞分詞 (短語短語) 作狀語時(shí)作狀語時(shí), 其邏輯主語必須其邏輯主語必須與句子的主語一致。與句子的主語一致。如果不一致，必須如果不一致，必須用獨(dú)立主格結(jié)構(gòu)來表示，也就是在分詞用獨(dú)立主格結(jié)構(gòu)來表示，也就是在分詞前面加上它的邏輯主語。前面加上它的邏輯主語。 The train having gone, we had to wait another day.（the train邏輯主語邏輯主語 + having gone 即為獨(dú)立主格結(jié)構(gòu)）即為獨(dú)立主格結(jié)構(gòu)）Weather permitting, we will go for a pic

35、nic tomorrow. （weather邏輯主語邏輯主語 + doing 即為獨(dú)立主格結(jié)構(gòu)即為獨(dú)立主格結(jié)構(gòu). 6. Watch a flash.鞏固鞏固v-ing形式作狀語以及獨(dú)立主格結(jié)構(gòu)形式作狀語以及獨(dú)立主格結(jié)構(gòu).7. Find in the text the sentences with v-ing forms or the perfect ing form.8. Finish Exercise3, 4, 5, 6 on page36 and page 37.1. 完成完成Workbook P71,72的練習(xí)的練習(xí).Homework2. Make up a dialogue accor

36、ding to the situation: Your group go to a volcano to collect a sample of boiling lava, take measurement in the crater and fly over a volcano to make a map of the direction of the lava. You will meet a lot of difficulties and have to overcome them.Period3Period3Learning about LanguageStep1 Discover u

37、seful words and expressions1. Watch the video of an episode of Vesuvius eruption.2. Look at some pictures of Vesuvius volcano and learn about it. This mountain has erupted more than 50 times since the eruption in 79 AD, when it buried Pompeii and its sister city, Herculaneum. After Pompeii was burie

38、d and lost to history, the volcano continued to erupt every 100 years until about 1037 A.D., when it entered a 600-year period of quiescence. In 1631, the volcano killed an additional 4000 unsuspecting inhabitants. Mount Vesuvius 1. Complete the text with the words below in their proper forms.The er

39、uption of Mount Vesuvius in 79 AD took People in Pompeii by surprise. It was so quick and so severe that the town was soon covered in _ and _. Many houses in the town were _. It was an _ disaster for many people who could not get away in time. A writerashlavaburned to the groundabsoluteNamed Pliny,

40、who was there during the _, described how lava was thrown into the air like a _._ many of the townspeople, _ at the _ sight of Vesuvius eruption, stayed too long and failed to escape in time.eruptionfountainUnfortunatelyamazedfantastic2. Find suitable words or expressions from the texts in the unit

41、so far to fill in the blanks.1) I went to a tea house with two friends last weekend but all they talked about was volcanoes. I was so _ that I fell asleep.2). A tourist very foolishly took a risk by walking right to the edge of an active _.boredvolcano3). I carefully _ over the fallen rocks and retu

42、rned to the car.made my way4). Nothing can _ the experience of standing close to an active volcano for the first time.Compare with5). Can volcanologists predict when a volcano will _?erupt6). The sight of hot lava entering the sea at dawn was _.impressiveStep2 Grammar v-ing 的一般式的一般式和完成式和完成式1. Watch

43、a flash . From the flash we can review the differences between v-ing and the past participle.a. 現(xiàn)在分詞表示主動(dòng)現(xiàn)在分詞表示主動(dòng), 過去分詞表示被動(dòng)過去分詞表示被動(dòng).b. 現(xiàn)在分詞表示進(jìn)行中的動(dòng)作現(xiàn)在分詞表示進(jìn)行中的動(dòng)作, 過去分詞過去分詞表示動(dòng)作已完成表示動(dòng)作已完成.2. Change the following sentences into v-ing form.1). I was feeling tired. I went to bed early.改成改成:Feeling tired, I

44、went to bed early.相當(dāng)于相當(dāng)于: As I felt tired, I went to bed early.2) I worked hard all day. I went to bed early.改成改成:Having worked hard all day, I went to bed early.相當(dāng)于相當(dāng)于: After I worked hard all day, I went to bed early.可以看出可以看出:a. 分詞的一般式說明分詞的動(dòng)作與主句分詞的一般式說明分詞的動(dòng)作與主句的謂語動(dòng)詞的動(dòng)作是同時(shí)發(fā)生的的謂語動(dòng)詞的動(dòng)作是同時(shí)發(fā)生的.b. 分詞的完成

45、式說明分詞的動(dòng)作發(fā)分詞的完成式說明分詞的動(dòng)作發(fā)生在主句謂語動(dòng)詞的動(dòng)作之前生在主句謂語動(dòng)詞的動(dòng)作之前.鞏固練習(xí)：鞏固練習(xí)：現(xiàn)在分詞的一般式和完成現(xiàn)在分詞的一般式和完成式之間進(jìn)行互換。式之間進(jìn)行互換。1). Studying volcanoes, I am amazed at their beauty as well as their potential to cause great damage.改成改成:Having studied volcanoes for twenty years, I am still amazed at their beauty as well as their po

46、tential to cause great damage.2). Having stood for several minutes, I saw some of my friends chatting at a table.改成改成:Arriving there, I saw some of my friends chatting at a table.3). Writing the letter, he left out something important.改成改成:Having written the letter, he read it carefully.3. 用分詞改寫句子用分

47、詞改寫句子:1) As I didnt know how to find the subway, I called a policeman for help.改成改成:Not knowing how to find the subway, I called a policeman for help.2) She didnt receive her fathers reply, so she wrote a letter again.改成改成:Not having received her fathers reply, she wrote a letter again.可以看出可以看出: 分詞的

48、否定式是在分詞前面分詞的否定式是在分詞前面加上否定詞加上否定詞not.4. 小結(jié)小結(jié)-ing 形式的形式的用法用法1. ing 形式作狀語形式作狀語用法用法例句例句時(shí)間時(shí)間 Seeing those pictures, she remembered her childhood. (= When she saw those pictures)用法用法例句例句原因原因 Being tired, I stopped to take a rest.(= Because I was tired, .)條件條件 Standing at the foot of a high mountain, you wi

49、ll find yourself very small. (= If you stand at the foot of a high mountain, .)用法用法例句例句讓步讓步 Knowing where I live, he never comes to see me .(= Though he knows where I live, .)用法用法例句例句伴隨伴隨 They stood there, watching the stars in the sky. (= , and watched the stars in the sky.)結(jié)果結(jié)果 She was so angry th

50、at she threw the toy on the ground, breaking it into pieces.(=, and broke it into pieces.)2. ing形式的完成式形式的完成式句句型型主主動(dòng)動(dòng)Having +p.p. , 主語主語+謂語謂語Having finished my work, I went home. (= After I had finished my work, .)被被動(dòng)動(dòng)(Having been) +p.p. , 主語主語+謂語謂語(Having been) written in haste, the book has some fa

51、ults.用法用法 ing形式的完成式所表示的時(shí)間在謂形式的完成式所表示的時(shí)間在謂語動(dòng)詞之前語動(dòng)詞之前3. Ing形式的否定式形式的否定式Ing 一般式一般式的否定式的否定式Not +v-ing, Not knowing how to find the subway, I asked a policeman for help. Ing 完成式完成式的否定式的否定式Not +having doneNot having experienced an earthquake before, I was frightened. 5. 使用使用- ing形式需注意的問題。形式需注意的問題。分詞分詞 (短語

52、短語) 作狀語時(shí)作狀語時(shí), 其邏輯主語必須其邏輯主語必須與句子的主語一致。與句子的主語一致。如果不一致，必須如果不一致，必須用獨(dú)立主格結(jié)構(gòu)來表示，也就是在分詞用獨(dú)立主格結(jié)構(gòu)來表示，也就是在分詞前面加上它的邏輯主語。前面加上它的邏輯主語。 The train having gone, we had to wait another day.（the train邏輯主語邏輯主語 + having gone 即為獨(dú)立主格結(jié)構(gòu)）即為獨(dú)立主格結(jié)構(gòu)）Weather permitting, we will go for a picnic tomorrow. （weather邏輯主語邏輯主語 + doing 即

53、為獨(dú)立主格結(jié)構(gòu)即為獨(dú)立主格結(jié)構(gòu). 6. Watch a flash.鞏固鞏固v-ing形式作狀語以及獨(dú)立主格結(jié)構(gòu)形式作狀語以及獨(dú)立主格結(jié)構(gòu).7. Find in the text the sentences with v-ing forms or the perfect ing form.8. Finish Exercise3, 4, 5, 6 on page36 and page 37.1. 完成完成Workbook P71,72的練習(xí)的練習(xí).Homework2. Make up a dialogue according to the situation: Your group go to

54、a volcano to collect a sample of boiling lava, take measurement in the crater and fly over a volcano to make a map of the direction of the lava. You will meet a lot of difficulties and have to overcome them.Step1 Discover useful words and expressions1. Watch the video of an episode of Vesuvius erupt

55、ion.2. Look at some pictures of Vesuvius volcano and learn about it. This mountain has erupted more than 50 times since the eruption in 79 AD, when it buried Pompeii and its sister city, Herculaneum. After Pompeii was buried and lost to history, the volcano continued to erupt every 100 years until a

56、bout 1037 A.D., when it entered a 600-year period of quiescence. In 1631, the volcano killed an additional 4000 unsuspecting inhabitants. Mount Vesuvius 1. Complete the text with the words below in their proper forms.The eruption of Mount Vesuvius in 79 AD took People in Pompeii by surprise. It was

57、so quick and so severe that the town was soon covered in _ and _. Many houses in the town were _. It was an _ disaster for many people who could not get away in time. A writerashlavaburned to the groundabsoluteNamed Pliny, who was there during the _, described how lava was thrown into the air like a

58、 _._ many of the townspeople, _ at the _ sight of Vesuvius eruption, stayed too long and failed to escape in time.eruptionfountainUnfortunatelyamazedfantastic2. Find suitable words or expressions from the texts in the unit so far to fill in the blanks.1) I went to a tea house with two friends last w

59、eekend but all they talked about was volcanoes. I was so _ that I fell asleep.2). A tourist very foolishly took a risk by walking right to the edge of an active _.boredvolcano3). I carefully _ over the fallen rocks and returned to the car.made my way4). Nothing can _ the experience of standing close

60、 to an active volcano for the first time.Compare with5). Can volcanologists predict when a volcano will _?erupt6). The sight of hot lava entering the sea at dawn was _.impressiveStep2 Grammar v-ing 的一般式的一般式和完成式和完成式1. Watch a flash . From the flash we can review the differences between v-ing and the

61、past participle.a. 現(xiàn)在分詞表示主動(dòng)現(xiàn)在分詞表示主動(dòng), 過去分詞表示被動(dòng)過去分詞表示被動(dòng).b. 現(xiàn)在分詞表示進(jìn)行中的動(dòng)作現(xiàn)在分詞表示進(jìn)行中的動(dòng)作, 過去分詞過去分詞表示動(dòng)作已完成表示動(dòng)作已完成.2. Change the following sentences into v-ing form.1). I was feeling tired. I went to bed early.改成改成:Feeling tired, I went to bed early.相當(dāng)于相當(dāng)于: As I felt tired, I went to bed early.2) I worked ha

62、rd all day. I went to bed early.改成改成:Having worked hard all day, I went to bed early.相當(dāng)于相當(dāng)于: After I worked hard all day, I went to bed early.可以看出可以看出:a. 分詞的一般式說明分詞的動(dòng)作與主句分詞的一般式說明分詞的動(dòng)作與主句的謂語動(dòng)詞的動(dòng)作是同時(shí)發(fā)生的的謂語動(dòng)詞的動(dòng)作是同時(shí)發(fā)生的.b. 分詞的完成式說明分詞的動(dòng)作發(fā)分詞的完成式說明分詞的動(dòng)作發(fā)生在主句謂語動(dòng)詞的動(dòng)作之前生在主句謂語動(dòng)詞的動(dòng)作之前.鞏固練習(xí)：鞏固練習(xí)：現(xiàn)在分詞的一般式和完成現(xiàn)在分詞的一

63、般式和完成式之間進(jìn)行互換。式之間進(jìn)行互換。1). Studying volcanoes, I am amazed at their beauty as well as their potential to cause great damage.改成改成:Having studied volcanoes for twenty years, I am still amazed at their beauty as well as their potential to cause great damage.2). Having stood for several minutes, I saw som

64、e of my friends chatting at a table.改成改成:Arriving there, I saw some of my friends chatting at a table.3). Writing the letter, he left out something important.改成改成:Having written the letter, he read it carefully.3. 用分詞改寫句子用分詞改寫句子:1) As I didnt know how to find the subway, I called a policeman for hel

65、p.改成改成:Not knowing how to find the subway, I called a policeman for help.2) She didnt receive her fathers reply, so she wrote a letter again.改成改成:Not having received her fathers reply, she wrote a letter again.可以看出可以看出: 分詞的否定式是在分詞前面分詞的否定式是在分詞前面加上否定詞加上否定詞not.4. 小結(jié)小結(jié)-ing 形式的形式的用法用法1. ing 形式作狀語形式作狀語用法用

66、法例句例句時(shí)間時(shí)間 Seeing those pictures, she remembered her childhood. (= When she saw those pictures)用法用法例句例句原因原因 Being tired, I stopped to take a rest.(= Because I was tired, .)條件條件 Standing at the foot of a high mountain, you will find yourself very small. (= If you stand at the foot of a high mountain, .)用法用法例句例句讓步讓步 Knowing where I live, he never comes to see me .(= Though he knows where I live, .)用法用法例句例句伴隨伴隨 They stood there, watching the stars in the sky. (= , and watched the stars in the sky.)結(jié)