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师梦圆初中英语教材同步人教版九年级全一册Section A Grammar focus 4a—4c下载详情
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注意事项:在以下情况中that不能省略

当句中的动词后接两个或两个以上由that引导的宾语从句时,第一个that可省,但后面的that不可省。

例句:He said (that) you were too young to understand the matter and that he was asked not to tell you.

当that从句是双宾语中的直接宾语时,that一般不可省略。

例句:I can’t tell him that his mother died.

B 由连词if、 whether 引导的表示“是否…”的宾语从句。whether, if 在从句中不做句子的成分,一般情况下,whether和if 可以替换。

  例:I don’t know if/whether he will come tomorrow.

The teacher asked if/whether we had finished the experiment.

注意事项:在以下情况中只能用whether

 1) 在介词后面的宾语从句中不用if引导

例:Everything depends on whether we have enough money。

 2)宾语从句中有or not时不用if引导.

  例:I don’t know whether the movie star will come or not.

3)和不定式连用作宾语时不用if引导.

例:I don’t know whether to stay here for dinner.

4)whether 放句首时不用if 引导

例:Whether they will join us in the picnic, I don’t care.

C 由wh-引导的宾语从句。连接代词who, whom, whose, what, which,和连接副词when, where, why, how 等连接的宾语从句,它们在句中即有连接从句的作用,又在句中充当句子的成分。

  例:You must take back what you said. (what做宾语)

   I don’t know where he lives. (where 做地点状语)

3. 宾语从句中需注意的问题

1) 时态

A 主句是现在的时态,从句时态不受限制,并根据实际情况定。

例: I hear (that) Tom will come back tomorrow.

She says Jim went to work an hour ago.

B 主句是过去的时态,从句也要用过去的时态。

例: He said (that) he had had supper already.

He said (that) he was reading a book.

C 如果从句说明的是客观存在的事实或真理,从句不受主句限制,一律用一般现在时。

例:My father told me that no news is good news.

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