3. 当宾语从句是一般疑问句时,由连词whether或if引导(口语中常用if), 因为if/whether翻译成是否,具有一定的意义,所以不能省略。

Lily wanted to know if /whether her grandma liked the handbag .

Let's see if /whether we can find out some information about that city

注意:

① 关联词只能用whether不能用if 表示 "是否"的情况如下：

A) 在表语从句和同位语从句中。如：

The question is whether the film is worth seeing.

The news whether our team has won the match is unknown.

B) 在主语从句中，只有用it 作形式主语时, whether和if 都能引导主语从句, 否则, 也只能用whether。如:

Whether we shall attend the meeting hasn't been decided yet.

It hasn't been decided whether (if) we shall attend the meeting.

C) 在介词之后。(介词往往可以省略) 如:

It all depends (on) whether they will support us.

D) 后面直接跟动词不定式时。如：

　 He doesn't know whether to stay or not.

E) 后面紧接or not 时。如：

　 We didn't know whether or not she was ready.

② 关联词if, whether均可使用的情况如下：

　 A) 引导宾语从句。如：

I wonder if (whether) the news is true or not.

B) 在 "be+形容词" 之后。如：

　　 He was not sure whether (if) it is right or wrong.

宾语从句要注意的几个问题

• 1. 时态呼应

• 2. 否定转移:

• 3. 形式宾语it的使用

注:在think, believe, suppose, expect 等动词之后,宾语从句中谓语的否定常转移