wonder if合wonder that的区别

wonder if合wonder that的区别

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.

wonder和if没有可比性，词性都不一样。你是不是搞错了 ①whether和if在宾语从句中可以互换，但是作介词宾语时连接词一般用whether。如： it all depends on whether they will come back. ②后面直接跟or not 时用whether。如： i didn’t know whether or not he had arrived in wuhan. ③主语从句表语从句中只能用whether。如： whether the meeting will be put off has not been decided yet. the question is whether they have so much money. ④whether可以引导同位语从句，用以说明前面的名词的内容，if不能。如： we ought to discuss carefully the question whether we can do it or not. ⑤whether常与or连用表示一种选择，if不能这样用；whether也可与动词不定式连用但if不能。如： the question of whether they are male or female is not impor- tant. i have not decided whether to go or not. ⑥间接引语位于句首时或者是间接引语提前时用whether不用if。如： thank you, but whether i’ll be free i’m not sure at the moment. ⑦whether可引导一个让步状语从句表示“不管”、“无论”，而if不能。如： whether he comes or not, we will begin our party on time.