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师梦圆高中英语教材同步译林版模块六 Module VI Making a better worldGrammar and usage(2): Unreal conditions下载详情
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《Grammar and usage(2): Unreal conditions》优质课PPT课件下载

if

要求,命令,建议

with,without,but for,otherwise,or

would rather

wish, if only, as if

It’s (high) time

It’s +n./adj. that sb./sth. (should) do

情态动词+have done的句型

Formula 1:if

(1)If sb./sth. had done, (过)

(2) sb./sth. would/could/might/should have done(过)

(1)If sb./sth. did/were sth., (现)

(2)sb./sth. would/could/might/should do(现)

(1)If sb./sth. did/were sth, (将)

should do,

were to do,

(2)sb./sth. would/could/might/should do(将)

Tip 1

1.if的倒装句。当if 省略时if分句中had, were, should提前,其他部分不变,构成倒装句。

友情提醒: If I had a big house , I would shelter all the homeless.

这里的had不能提前,因为这里的had不是助动词,因此不能提前,只有had done 里的had在省略if时需提前。

Tip 2

错综搭配,主要看时间状语。公式中分句与主句基本对称使用,但高考中常常会设陷阱:

--The whether has been very hot and dry.

--Yes. If it had rained even a drop, things ____( much better) now! And my vegetables _______(not die).

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