非谓语动词的句法功能 一 作主语A . 不定式 To see is to believe. ( 强调具体行动更强调一次性)B. ing Seeing is believing. 眼见为实 ( 一般行为)C. the+ 过去分词 表一类人 The injured were sent to hospital.常用不定式的惯用句1. It is + adj. +to do sth eg: It is not safe to drink the polluted water. It is + adj.+ of sb to do sth for sb to do sth eg: It is kind of him to help. ( He is kind.) It is impossible for him to help us. ( He is impossible. x)2. It is a/ an +n (crime, mistake, pity, shame, good idea) + to do sth eg: It is an offence to take photos here
