2012年12月大学英语四级语法:不定式3+ V5 X# v2 x. ? J, _
不定式的完成式8 ^) `" [0 m" g4 |: \$ e
当不定式的动作发生在谓语动词的动作之前,不定式要用完成式,在句中可作宾语,状语以及构成复合宾语,复合谓语。- r% b3 A) k4 }) J& s I
She seemed to have heard about the news already。www.examw.com ; ^) n8 i" O, d0 F9 N& J He was believed to have been a very rich man。