whether用法(whether用法)

hether和if的用法分析

hether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 onder if / hether I can get some advice from you.

Ask him hether / if he can e.

但在有些情况下,hether和if的用法有一定区别.

1.hether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 kno hether you can e or not.

误Let me kno if you can e or not.

2.当宾语从句提到句首时,只能用hether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.hether可以引导带to的不定式,if则不能.如

正I don’t kno hether to aept or refuse.

误I don’t kno if to aept or refuse.

4.hether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 orry about hether I hurt her feelings.

误I orry about if I hurt her feelings.

5.hether可以引导从句,作主语、表语或同位语,而if不能.如

正It as uncertain hether he ould e.

误It as uncertain if he ould e.

正His first question as hether Tom had arrived yet.

误His first question as if Tom had arrived yet.

正We must consider the question hether e ill take these measures.

误We must consider the question if e ill take these measures.