she is proud to do it中to do it 是什么成分为什么
she is proud to do it中to do it 是什么成分为什么
it is polite to do
______ is what she wants to know.a.Who to do it b.Whom to do
She is able to do it on __ own
she knows how to do it是什么从句
it is+adj + to do sth?it表示什么?to do是什么状态?
在it is time for sb to do这个句型中,for和to各引导什么成分
She found it difficult to do the work.的宾语补足语是什么?为什么?
She finds that it is impossible to do sth和 She finds it impo
She will explain to us how to do it if she is here now.(改为虚拟
为什么是it is good/bad manners to do sth.
It is adj to do与doing的区别是什么?