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1、Unit 4 What would you do?Section AGrammar focus1.虛擬語氣虛擬語氣：如果我們所說的不是事實(shí)：如果我們所說的不是事實(shí),也不是也不是要求、命令、勸告等，而只是一種假設(shè)、愿望、要求、命令、勸告等，而只是一種假設(shè)、愿望、建議或是一種實(shí)現(xiàn)不了的空想就用虛擬語氣。建議或是一種實(shí)現(xiàn)不了的空想就用虛擬語氣。 注意注意: 條件句分兩種條件句分兩種, 真實(shí)條件句和虛擬條件真實(shí)條件句和虛擬條件句。只有在虛擬句。只有在虛擬(非真實(shí)非真實(shí))條件條件 句中句中, 才用虛擬語氣才用虛擬語氣, 而在真實(shí)條件句中而在真實(shí)條件句中, 要用要用陳述語氣。陳述語氣。請比較：請比較：(1

2、). If it is sunny tomorrow, well go to the zoo. 如果明天天氣好如果明天天氣好, 我們將會去公園。我們將會去公園。 在這句話中在這句話中, 明天天氣好是完全明天天氣好是完全有可能實(shí)現(xiàn)的有可能實(shí)現(xiàn)的, 并非虛擬、幻想并非虛擬、幻想, 因此因此是真實(shí)條件句。是真實(shí)條件句。(2). If I were you , I would go at once. (如果我是你的話如果我是你的話, 我立刻就走。我立刻就走。) 這句話是條件句這句話是條件句 “如果我是你如果我是你”, 但事實(shí)上但事實(shí)上, 我不可能成為你我不可能成為你, 這只是假設(shè)的情況這只是假設(shè)的情況

3、, 沒有實(shí)沒有實(shí)現(xiàn)的可能。當(dāng)條件實(shí)現(xiàn)的可能性很小現(xiàn)的可能。當(dāng)條件實(shí)現(xiàn)的可能性很小, 甚至可甚至可以說沒有時以說沒有時, 就需要用虛擬語氣來表示就需要用虛擬語氣來表示, 動詞動詞發(fā)生了變化。也就是說虛擬語氣表示和現(xiàn)實(shí)發(fā)生了變化。也就是說虛擬語氣表示和現(xiàn)實(shí)的事實(shí)相反時，從句用一般過去時的事實(shí)相反時，從句用一般過去時, 主句用主句用 “should/would/could/ might +動詞原形動詞原形” 。If I had time, I would go for a walk.If I were invited, I would go to the dinner party. If I won

4、 a million dollars in the lottery, I would put it in the bank.2. He doesnt know if he should bring a present. 此處此處 if 表示表示“是否是否”, 引導(dǎo)賓語從句。引導(dǎo)賓語從句。Should此處表示此處表示“應(yīng)該應(yīng)該”, 不是虛擬語氣。不是虛擬語氣。 e. g. . I dont know if I should go to the party. . If I have enough money, I will go to Hainan. Present 在這是在這是“禮物禮物”的意思

5、。的意思。3. If I were you, Id wear a shirt and tie. if 引導(dǎo)的條件狀語從句表示與現(xiàn)在事實(shí)相反引導(dǎo)的條件狀語從句表示與現(xiàn)在事實(shí)相反的虛擬語氣時的虛擬語氣時, be動詞只能用動詞只能用were, 而不能用而不能用was。e. g. If he were here, he would not agree with you.4. I dont have a present. What if everyone else brings a present? What if “如果如果怎么辦怎么辦? ”相當(dāng)于相當(dāng)于 what would happen if e.

6、 g. What shall I do if it snows?3a Match each problem with the correct advice.1. Im really shy and I just dont enjoy parties. I dont know what to say or do. -Mouse 2. I get nervous before big parties and then I get pimples. They look terrible! What should I do? -Spotty3. I cant sleep the night befor

7、e I take a big exam. Then Im too tired to do well. What should I do? -Sleeplessa. The foods you eat could help with this problem. You should eat lots of fruits and vegetables and drink lots of water.b. If I were you, Id take a long walk before going to bed. That should help you relax.c. If I were yo

8、u, Id talk to someone who looks friendly. Then you wont feel so shy.cabExplanationI get nervous before big parties. 在大的晚會之前在大的晚會之前,我會感到緊張。我會感到緊張。 get nervous 變得緊張變得緊張, get是系是系動詞動詞, nervous是形容詞做表語。是形容詞做表語。 又如又如: be nervous 或或feel nervous 均可表達(dá)同樣的含義。均可表達(dá)同樣的含義。3b Think of different advice for the proble

9、ms in activity 3a. Role play conversations with your partner.Sample conversations： 1. Im really shy and I just dont enjoy parties. I dont know what to say or do. What should I do? If I were you, Id talk to people I dont know. 2. I get nervous before big parties and then I get pimples. They look terrible! What should I do? If I were you, Id try to talk to someone and forget about the parties.3. I cant sleep the night before I take a big exam. Then Im too tired to do well. What should I do? If I were you, Id do some sports or drink some milk before going to bed.