(1) 一是表示將來，即表示發(fā)生在謂語動(dòng)作之后的動(dòng)作。如： We decided to leave early. 我們決定早點(diǎn)動(dòng)身。 He asked me to buy him some paper. 他叫我給他買些紙。 We expect him to come in time. 我們希望他能及時(shí)來。 (2) 表示與謂語動(dòng)作同時(shí)發(fā)生或略先于謂語動(dòng)作的動(dòng)作。如： He seems to be tired. 他似乎累了。 Who heard him say that? 是誰聽到他這樣說的? I’m sorry to hear that. 聽到這事我很難過。(to hear 略先于am sorry)