A big crowed gathered _to hear____(hear)him speaking__(speak)怎么填? 再问: why???????????????????????? 再答: 前面那个to do 是不定式作目的状语,后面hear sb doing做宾补 To hear him speaking 意思,听某人讲话,听某人发言 句子结构为:主语+ 谓语+ 不定式做目的状语结构 (其中目的状语有带有现在分词做HIM 的宾语补足语结构.Sb + Verb + to Hear Him Speaking