Question

初中英语，求解

初中英语，求解The students wonder the question whether the book is worth reading.这个句子中“whether”能否替换成“if”?

Answer 1

一、只用 whether 的情况：
1 在表语从句和同位语从句中只能用whether表“是否”。如：
He answered my question whether he would come .
The news whether our team has won the game is not known.
The question is whether the book is worth baying.
2 当主语从句位于主语位置上时，只能用whether表“是否”。如：
Whether it will rain is not clear .
Whether they will come in time is a question .
3 在介词后面引导宾语从句表“是否”，只能用whether。如：
It all depends on whether they will support us .
The discussion focused on whether they would buy a new car .
4 后面直接跟动词不定式时，只能用whether表“是否”。 如：
I don’t know whether to stay or not. .
5 后面紧跟or not 时。如：
We didn’t know whether or not she was ready .
6 引导让步状语从句时，只能用whether 。如：
Whether you like it or not ,you must do it well .
7 用if会引起歧义时。如：
Please let me know if you like it .
这个句子可有两个意思：“请告诉我你是否喜欢。”或“如果你喜欢，请告诉我。”用whether就可以避免歧义。

Answer 2

question后面只能加whether不能换成if