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whether的用法总结(whether用法)

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whether和if的用法分析

whether和if都可以引导宾语从句,表示“是否”,在口语或间接引语中两者可以互换使用。如:

I wonder if / whether I can get some advice from you.

Ask him whether / if he can come.

但在有些情况下,whether和if的用法有一定区别。

1. whether引导的从句常可以与连词or或or not直接连用,而if一般不能。如:

正: Let me know whether you can come or not.

误: Let me know if you can come or not.

2. 当宾语从句提到句首时,只能用whether引导,而不能用if。如:

正: Whether it is true or not, I can’t tell.

误: If it is true or not, I can’t tell.

3. whether可以引导带to的不定式,if则不能。如:

正: I don’t know whether to accept or refuse.

误: I don’t know if to accept or refuse.

4. whether及其引导的成分可放于介词之后,作介词的宾语,但if不能。如:

正: I worry about whether I hurt her feelings.

误: I worry about if I hurt her feelings.

5. whether可以引导从句,作主语、表语或同位语,而if不能。如:

正: It was uncertain whether he would come.

误: It was uncertain if he would come.

正: His first question was whether Tom had arrived yet.

误: His first question was if Tom had arrived yet.

正: We must consider the question whether we will take these measures.

误: We must consider the question if we will take these measures.

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