(1) 一是表示將來，即表示發(fā)生在謂語動作之後的動作。如： We decided to leave early. 我們決定早點(diǎn)動身。 He asked me to buy him some paper. 他叫我給他買些紙。 We expect him to come in time. 我們希望他能及時來。 (2) 表示與謂語動作同時發(fā)生或略先於謂語動作的動作。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 略先於am sorry)