Practice：Choose the correct answer

1. If there were no water in theworld, everything ______.
A. will dieB. would die
C. would have died D. havedied
2.If it _____ another ten minutes, the game would have been calledoff.
A. had rained B. would have rained
C. were to rain D. raine
3. If he _____ today, he would get there by Friday.
A. would leave B. was leaving
C. were to leave D. leaves

If引導(dǎo)的條件句(if clause)

（一）if 引導(dǎo)的非真實(shí)條件句(英語(yǔ)語(yǔ)法中又叫第二條件句-Secondconditional)

1. if引導(dǎo)的非真實(shí)條件句表示：

（1）虛擬的條件：

If there were no water in the world, everything woulddie.

(如果世界上沒(méi)有水的話，一切生物都會(huì)死亡）

（2）與現(xiàn)在的事實(shí)相反：

If I had money, I would buy a plane.(要是我有錢(qián)的話，我就會(huì)買(mǎi)架飛機(jī)）

2. 結(jié)構(gòu)：

If引導(dǎo)的非真實(shí)條件句有兩部分組成：主句 和 從句

If 引導(dǎo)的句子做從句，另外的句子是主句。

位置：If引導(dǎo)的句子可以放在句首，也可以放在主句后。

翻譯：如果我有足夠的前，我就買(mǎi)那套房子。

eg. If I had enough money, I'd buy that apartment.

I'd buy that apartment if I had enough money.

注：If引導(dǎo)的句子如果放在句首，在主句前要加逗號(hào)。如果放在主句后的話就不必加逗號(hào)了。

3.非真實(shí)條件句 主句和從句的時(shí)態(tài)和結(jié)構(gòu)：

（1）If she were rich,she would move to Caribbean.

If I had some free time, Iwould go with you.

if從句用一般過(guò)去式， 主句用過(guò)去將來(lái)時(shí)。

if+ ...were/ did ....,....would/could + do....

(2) If it had rained another ten minutes, thegame would have been called for stop.

if從句用過(guò)去完成時(shí)， 主句用過(guò)去將來(lái)完成時(shí)。

if + ...had done...,.....would/couldhave done.....

(3) If I could plan to do anything I wanted to, I’d like to go toTibet.

If... could do...., .... would do......

(4)If he were to leave today, he would get there by Friday.
If .... were to do....., ...... woulddo......

注：主句中的would經(jīng)?？s寫(xiě)為'd

4.錯(cuò)綜時(shí)間條件句

非真實(shí)條件句中，如果主句的時(shí)間和從句的時(shí)間不一致，那么主句和從句應(yīng)該用什么時(shí)態(tài)和結(jié)構(gòu)？

Example

If you ______ hard yesterday, you ____ tired now.
A. had worked; would be B. would have worked; were
C. have worked; were D. worked; had been

總結(jié):當(dāng)從句與主句所表示的時(shí)間不一致時(shí),主句和從句的動(dòng)詞形式?jīng)Q定于要表示的具體時(shí)間。此題答案選AIf+... had done..., ....woulddo...
Practice:
a.If it ___________ (rain) last night, you __________(feel) verycold today
b.If you _____________ (not watch) that late movie last night, you___________ (not be) so

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