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例如：

If it rains tomorrow, I will not climb the hills.

注意區(qū)別：if/whether引導(dǎo)賓語從句，時態(tài)根據(jù)語境而定。

例如：I don′t know if it will rain tomorrow.

6、so…that/such…that(如此…以致，因而)

Such+(a)+名詞+that

例如：

His idea was such a good one that we all agree to use it.

So+/形容詞或副詞/形容詞+a(n)+單數(shù)可數(shù)名詞+that/+many/few/+復(fù)數(shù)可數(shù)名詞/+much/little+不可數(shù)名詞。

例如：

Bob is so tall that he can almost reach the ceiling.

He ran so quickly that we couldn′t keep up with him.

There was so little water left that only small children and patients were given some.

注意：such a nice city=so nice a city

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