什么是现在完成时?答:4.现在完成时特别强调瞬间动词和持续性动词。瞬间动词表示短暂、不能持续一段时间的动作,如come,go,leave,start,begin,become,receive,die,而持续性动词表示能持续一段时间的动作,如work,stay,live,learn等。下面列举一些常用的瞬间动词和对应的持续性动词:leave,be away;die,be dead;put on,wear;fall ill,be ...
现在完成时的构成和用法答:3)现在完成时可表示持续到现在的动作或状态,动词一般是延续性的,如live, teach, learn, work, study, know. 过去时常用的非持续性动词有come, go, leave, start, die, finish, become, get married等。 举例: I saw this film yesterday. (强调看的动作发生过了。) I have seen this film. (强调对...