if、whether引导的宾语从句

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宾语,从句,引导,whether

if / whether引导的宾语从句

一、由if或whether引导的宾语从句。if/ whether “是否”，说明对陈述的事物不明确或不清楚。

常用在ask, wonder, can(could) you tell me 等后，二者通常可以互换。例如：Lily asked if/whether she liked it.莉莉问她是否喜欢它。

I want to know if (whether) he lives there.我想知道他是否住在这儿。 He asked me whether (if) I could help him.他问我是否可以帮助他。小试牛刀：1、Mr.Ding asked . Could he come at seven ?

2、She wanted to know. Did you have a good time?

二、只能用 whether不能用 if 的情况

（1）在介词后面：

例如：I’m thinking of whether we should go fishing.

We are worried about whether it will rain tomorrow. （2）在动词不定式前(whether to do sth.) ：例如：They asked me whether to go skating. （3）当与or not连用，或提出两种选择时: 例如：I don’t know whether he’s free or not.

Mary asked whether I was doing my homework or not. （4）宾语从句提前时：

例如：Whether this is true or not, I can’t say. 小试牛刀：请用if、whether填空

1. I asked her___________ she had a bike. 2. We’re worried about ___________ he is safe. 3. I wonder ___________ he is well.

4. I don’t know ___________ or not he is well. 5. I don’t know ___________ to go.

三、宾语从句的语序：引导词+主语+谓语+其他成分

例如：I think that we can be good friends. I can’t remember if I posted the letter. May we ask what you are doing?

四、特殊的宾语从句———间接引语

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当直接引语是一般疑问句，改为间接引语时，连接代词用if或whether，而引述选择疑问句时用whether，引述动词用ask，没有间接宾语的可以加一个间接宾语me, him等。

例如：She said to Tom,“Can you help me ?” →She asked Tom if / whether he could help her. She asked,“Is this book yours or his?” →She asked me whether that book was mine or his.

小试牛刀：

1、The teacher asked,“Are you waiting for the bus?”→The teacher asked . 2、He asked , “ Are you a Party member or a League member?”→He asked . 3、He said,“Did you see me last night?” →______________________________________.

练习

一、单选题。

1. The young man asked _____ it's summer or winter. A. either B. that C. weather D. whether

2. I don't know _________ he will come tomorrow. _________ he comes, I'll tell you． A. if; Whether B. whether; Whether C. if; That D. if; If 3. The teacher asks us ____ Jim can come back on time .

A. that B. if C. when D. what time

4. Does anybody know ______ we will have a sports meeting this weekend or not . A. if B. where C. whether D. that 5. He says that if it _______ tomorrow , he _____fishing.

A. will rain , won't go B. rained , wasn't go C. rains , won't go D. rain , will go

二、按要求填空。

1、 I want to know ______________________________________. (他是否要和我们一起去Party) 2、Ask him ______________________________________. (他是否能来)

3、 Could you tell me______________________________________ ?（李先生是否住这里） 4、Do they like to go skiing? He asked. （将句子合并为一句） 5、 Is she doing her homework? Jim asked. （将句子合并为一句）

6、She said to Tom,“Are there any apples on the table ?”

→ . 7、She asked,“Have you finish your homework ?”

→ . 8、She asked,“ Will you come with me tomorrow ?”

→ .

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