賓語從句引導詞

在復合句中作主句的賓語，引導詞有：連詞：that (that 常可省略),whether, if；代詞：who, whose, what ,which；副詞：when ,where, how, why等。

that引導的賓語從句(在非正式場合that可以省略)

可跟that從句做賓語的動詞有：

say, think, insist, wish, hope, demand, imagine, wonder, know, suppose, see, believe, agree, admit, deny, expect, explain, order, command, feel, dream, suggest, hear, mean, notice, prefer, request, require, propose, declare, report等。

例句：The boy believes that he will travel through space to other planets.

注意事項：當主句謂語動詞是 think, believe, suppose, expect 等詞，而賓語從句的意思是否定時，常把否定轉移至主句表示。

例句：I don’t think it is right for him to treat you like that.

由whether,if 引導的賓語從句

由whether(if)引導的賓語從句，實際上是一般疑問句演變而來的。意思是“是否”。賓語從句要用陳述句語序。一般說來，在賓語從句中whether與if可以互換使用，但在特殊情況下if與whether是不能互換的。

例句：I wonder whether(if) they will come to our party.

只能用whether，不能用if引導的賓語從句

1、在帶to的不定式前

例句：We decided whether to walk there.

2、在介詞的后面

例句：I’m thinking of whether we should go to see the film.

3、在動詞后面的賓語從句時

例句：We discussed whether we had a sports meeting next week

4、直接與or not連用時

例句：I can’t say whether or not thet can come on time.