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虛擬語(yǔ)氣用來(lái)表達(dá)不可能或難以實(shí)現(xiàn)的愿望，與事實(shí)相反的假設(shè)，通常分為基本的三種形式。
1. 與現(xiàn)在事實(shí)相反的虛擬：
If + did / were + ..., ... would
should
could + do （動(dòng)詞原形）
might
If I were you, I would go abroad at once. (I am not you.)
If he knew it now, he could help me. (He doesn't know it now.)
2. 與過(guò)去事實(shí)相反的虛擬：
If + had done + ..., ... would (might) have done ...
If I had known your telephone number yesterday, I would have phoned you.
(I didn't know your telephone number.)
If you had come here a little earlier just now, you might have met her.
(You didn't come here earlier.)
3. 與將來(lái)事實(shí)相反的虛擬：
(1) If + should + v., ... would + v.
（可能性很?。ㄗg作“萬(wàn)一”）
If it should rain tomorrow, you could stay at home.
If I should fail, what should I do?
(2) If + did / were to + v ..., would + v.
（完全不可能）
If the sun were to rise in the west, I would lend you the money.
If you finished it in 3 minutes, I would give you my car.
金牌特殊重點(diǎn)：
［簡(jiǎn)單聯(lián)想記憶］：
● 下列動(dòng)詞后的“賓語(yǔ)從句”中需要用虛擬形式，即should + 動(dòng)詞原形，shoud在美國(guó)英語(yǔ)中要省略（TOEFL語(yǔ)法考點(diǎn)）。此類常見(jiàn)的動(dòng)詞有：order, ask, decide, demand, require, recommend, suggest（建議）insist（堅(jiān)決要求），advise, etc.
例句：He suggested that we (should) help them with English.
The teacher ordered that the homework (should) be finished within half an hour.
● 下列名詞后的同位語(yǔ)從句中要用“should + 動(dòng)詞原形”（should可省去）的虛擬。
suggestion, order, request, demand, importance, proposal.
He made a suggestion that we (should) have a fancy dress party.
I think it is a thing of importance that it (should) be done soon.
● It is / was important / necessary / natural / essential / advisable / strange / surprising, ect. + that +主語(yǔ)+ should + v.
It is strange that you should say such a thing.
It was important that you should tell me all the information.
● wish后的賓語(yǔ)從句中，as if 后的狀語(yǔ)從句中，須用下列的虛擬形式：
主 + wish+ (that) + 主 + did / were（指現(xiàn)在）
had done（指過(guò)去）
would+ v.（指將來(lái)）
I wish that I met my uncle now.
I wish I had met my uncle yesterday.
I wish I could meet my uncle tomorrow.
● It is (high) time that ... + did / were ...
It is time that you went to bed.
● would rather that ... + did / were ...
I would rather that you were not here now.
● would sooner that ... + did / were ...
I would sooner that you got up earlier.
I would sooner that you were not my brother.
測(cè)試精編：
I. 選擇正確選項(xiàng)：
1. I ________ he had taught me the word, but he didn't.
A. believe B. hope C. wish D. think
2. The man in charge recommends that this matter ________ at the meeting. A. would be discussed B. will be discussed C. be discussed D. may be discussed
3. It is raining now, otherwise we ________ go out play.
A. could B. can C. may D. will
4. ________ he come late, give him the message.
A. Had B. Should C. Would D. Did
5. Hadn't my car broke down, I ________ the train.
A. would have caught B. might catch C. could catch D. would catch
6. I would have helped him if I had time, but I ________.
A. haven't B. had C. didn't D. wouldn't
7. The dam was built in time to protect the inhabitants from the flood; ________.
A. otherwise the damage would be beyond measure.
B. the damage, otherwise, should be very great.
C. the damage could have been very serious otherwise.
D. the damage caused, therefore, many of them homeless.
8. It is natural that an employee ________ his work on time.
A. finishes B. finish C. can finish D. finishs
9. I would go abroad but that I ________ poor.
A. am B. was C. shall be D. were
10. Don't act as if you ________ the only pebble on the beach.
A. are B. were C. have been D. would be
虛擬語(yǔ)氣用來(lái)表達(dá)不可能或難以實(shí)現(xiàn)的愿望，與事實(shí)相反的假設(shè)，通常分為基本的三種形式。
1. 與現(xiàn)在事實(shí)相反的虛擬：
If + did / were + ..., ... would
should
could + do （動(dòng)詞原形）
might
If I were you, I would go abroad at once. (I am not you.)
If he knew it now, he could help me. (He doesn't know it now.)
2. 與過(guò)去事實(shí)相反的虛擬：
If + had done + ..., ... would (might) have done ...
If I had known your telephone number yesterday, I would have phoned you.
(I didn't know your telephone number.)
If you had come here a little earlier just now, you might have met her.
(You didn't come here earlier.)
3. 與將來(lái)事實(shí)相反的虛擬：
(1) If + should + v., ... would + v.
（可能性很?。ㄗg作“萬(wàn)一”）
If it should rain tomorrow, you could stay at home.
If I should fail, what should I do?
(2) If + did / were to + v ..., would + v.
（完全不可能）
If the sun were to rise in the west, I would lend you the money.
If you finished it in 3 minutes, I would give you my car.
金牌特殊重點(diǎn)：
［簡(jiǎn)單聯(lián)想記憶］：
● 下列動(dòng)詞后的“賓語(yǔ)從句”中需要用虛擬形式，即should + 動(dòng)詞原形，shoud在美國(guó)英語(yǔ)中要省略（TOEFL語(yǔ)法考點(diǎn)）。此類常見(jiàn)的動(dòng)詞有：order, ask, decide, demand, require, recommend, suggest（建議）insist（堅(jiān)決要求），advise, etc.
例句：He suggested that we (should) help them with English.
The teacher ordered that the homework (should) be finished within half an hour.
● 下列名詞后的同位語(yǔ)從句中要用“should + 動(dòng)詞原形”（should可省去）的虛擬。
suggestion, order, request, demand, importance, proposal.
He made a suggestion that we (should) have a fancy dress party.
I think it is a thing of importance that it (should) be done soon.
● It is / was important / necessary / natural / essential / advisable / strange / surprising, ect. + that +主語(yǔ)+ should + v.
It is strange that you should say such a thing.
It was important that you should tell me all the information.
● wish后的賓語(yǔ)從句中，as if 后的狀語(yǔ)從句中，須用下列的虛擬形式：
主 + wish+ (that) + 主 + did / were（指現(xiàn)在）
had done（指過(guò)去）
would+ v.（指將來(lái)）
I wish that I met my uncle now.
I wish I had met my uncle yesterday.
I wish I could meet my uncle tomorrow.
● It is (high) time that ... + did / were ...
It is time that you went to bed.
● would rather that ... + did / were ...
I would rather that you were not here now.
● would sooner that ... + did / were ...
I would sooner that you got up earlier.
I would sooner that you were not my brother.
測(cè)試精編：
I. 選擇正確選項(xiàng)：
1. I ________ he had taught me the word, but he didn't.
A. believe B. hope C. wish D. think
2. The man in charge recommends that this matter ________ at the meeting. A. would be discussed B. will be discussed C. be discussed D. may be discussed
3. It is raining now, otherwise we ________ go out play.
A. could B. can C. may D. will
4. ________ he come late, give him the message.
A. Had B. Should C. Would D. Did
5. Hadn't my car broke down, I ________ the train.
A. would have caught B. might catch C. could catch D. would catch
6. I would have helped him if I had time, but I ________.
A. haven't B. had C. didn't D. wouldn't
7. The dam was built in time to protect the inhabitants from the flood; ________.
A. otherwise the damage would be beyond measure.
B. the damage, otherwise, should be very great.
C. the damage could have been very serious otherwise.
D. the damage caused, therefore, many of them homeless.
8. It is natural that an employee ________ his work on time.
A. finishes B. finish C. can finish D. finishs
9. I would go abroad but that I ________ poor.
A. am B. was C. shall be D. were
10. Don't act as if you ________ the only pebble on the beach.
A. are B. were C. have been D. would be