①表示状态的动词,尤其是静态动词,如:be, have ②表示认识、知觉和情感的动词,如:know, think, hear, find, see, like, want, wish, prefer等。 (5)现在完成时的用法 1) 现在完成时表示在说话之前已经完成或刚完成的动作。 I have bought a ten-speed bicycle. They have cleaned the classroom. 2) 现在完成时表示动作从过去开始持续到现在,或者还有可能持续下去的动作或状态。 现在完成时常与for 和 since 引导的短语或从句连用。 We have lived here since 1976. They have waited for more than two hours. 【注意】 一般过去时与现在完成时的区别 过去时表示过去某时发生的动作或单纯叙述过去的事情,强调动作;现在完成时为过去发生的,强调过去的事情对现在的影响,强调的是影响;一般过去时常与具体的时间状语连用。 试比较: I saw this film yesterday.(强调看的动作发生过了,不涉及现在) I have seen this film. (强调对现在的影响,电影的内容已经知道了。) (6)过去进行时的用法 表示过去某时正在进行的状态或动作。例如: I was watching TV when she came to see me. 【注意】 过去进行时和一般过去时都是过去发生的事情,但过去进行时侧重表示过去某一时刻正在进行的动作或所处的状态,强调动作的连续进行,而一般过去时则表示单纯的过去事实,例如: They were building a house last month. (上个月正在建造,建造好与否不知) They built a new house last month. (上个月建造好了,动作已经完成) (7)过去完成时的用法 过去完成时表示过去某一时刻或某一动作之前完成的动作或所处的状态,过去完成时常和 by , before 等词组成的短语和从句连用。 We had already learned two thousands words by the end of last year. When we arrived at the station, they had waited for more than twenty minutes. (8)过去将来时的用法 过去将来时表示从过去某个时间看将要发生的动作或存在地状态,过去将来时较多地被运用在宾语从句中。例如: They were going to have a meeting. I told him that I would see him off at the station.
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