唐悦
幼苗
共回答了14个问题采纳率:85.7% 举报
1.if/whether,enjoys
2.if/whether,needed
3.Neither,nor
4.when,leaves
5.didn't,until
6.if/whether,came
但有时候if和whether不能互换.
1.引导主语从句,表语从句,同位语从句时只能用whether.
2如果其后接不定式时,只能用whether.
3.引导的从句作介词宾语时,只能用whether.
we have not settled the problem of whether we will play football.(这里of是介词)
4.其后如果接or not时,只能用whether.
5.作discuss,consider,decide的宾语时用whether而不用if.
1年前
4