作业帮The mayor wasn't sure whether he will be re-elected or not. 请问这句whether可否改成if
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The mayor wasn't sure whether he will be re-elected or not. 请问这句whether可否改成if
The mayor wasn't sure whether he will be re-elected or not. 请问这句whether可否改成if
The mayor wasn't sure whether he will be re-elected or not. 请问这句whether可否改成if
不可以,只要后面有or not,就只能用whether,whether.or not 连用的.
可以的，现在英语语法中只要三个词不是连在一起的（即whether or not)是可以用if的，而且在一般5种只用whether的情况中没有这一点，所以是可以的
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...
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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：
Let me know whether 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：
Whether 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：
I don’t know whether 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：
I worry about whether 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：
It was uncertain whether he would come.
His first question was whether Tom had arrived yet.
应该够用了！
正： We must consider the question whether we will take these measures
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