whether和if的用法有一定區別.
1.whether引導的從句常可以與連詞or或or not直接連用,而if一般不能.如:
正:Let me know whether you can come or not.
誤:Let me know if you can come or not.
2.當賓語從句提到句首時,只能用whether引導,而不能用if.如:
正:Whether it is true or not,I can’t tell.
誤:If it is true or not,I can’t tell.
3.whether可以引導帶to的不定式,if則不能.如:
正:I don’t know whether to accept or refuse.
誤:I don’t know if to accept or refuse.
4.whether及其引導的成分可放於介詞之後,作介詞的賓語,但if不能.如:
正:I worry about whether I hurt her feelings.
誤:I worry about if I hurt her feelings.
5.whether可以引導從句,作主語、表語或同位語,而if不能.如:
正:It was uncertain whether he would come.
誤:It was uncertain if he would come.
正:His first question was whether Tom had arrived yet.
誤:His first question was if Tom had arrived yet.
正:We must consider the question whether we will take these measures.
誤:We must consider the question if we will take these measures.
whether和if的用法有一定區別.
1.whether引導的從句常可以與連詞or或or not直接連用,而if一般不能.如:
正:Let me know whether you can come or not.
誤:Let me know if you can come or not.
2.當賓語從句提到句首時,只能用whether引導,而不能用if.如:
正:Whether it is true or not,I can’t tell.
誤:If it is true or not,I can’t tell.
3.whether可以引導帶to的不定式,if則不能.如:
正:I don’t know whether to accept or refuse.
誤:I don’t know if to accept or refuse.
4.whether及其引導的成分可放於介詞之後,作介詞的賓語,但if不能.如:
正:I worry about whether I hurt her feelings.
誤:I worry about if I hurt her feelings.
5.whether可以引導從句,作主語、表語或同位語,而if不能.如:
正:It was uncertain whether he would come.
誤:It was uncertain if he would come.
正:His first question was whether Tom had arrived yet.
誤:His first question was if Tom had arrived yet.
正:We must consider the question whether we will take these measures.
誤:We must consider the question if we will take these measures.