请问一下英语什么时候用不定式!最好详细点!答:人们认为这本书没什么意思。4) there be+不定式 believe, expect, intend, like, love, mean, prefer, want, wish, undrstand We didn't expect there to be so many people there.我们没料到会有那么多人在哪里。有些动词需用as 短语做补语,如regard, think believe, take, consider.We ...