英语语法：过去完成体用法-英语课

时间：2018-12-18 作者：英语课 分类：英文语法词汇

英语课

　　完成体是动词的一种形式，表示动作或状态已经完成，结构是：主动词have的不同时态+-ed分词。可以分为现在完成体和过去完成体。现在完成体大家比较熟悉了，那么今天小编就和大家一起学习我们不太熟悉的过去完成体~

　　过去完成体，顾名思义，就是表示在过去某一时间之前已经发生或完成的动作，也就是我们所说的“过去的过去”。因此，它有“已完成”用法和“未完成”用法。结构为：had 1+-ed分词。
　　一、“已完成”：表示一个动作或状态在过去某时之前已经完成或结束。
　　I had finished 2 my homework when my friends came 3.我朋友来的时候，我就已经完成家庭作业了。
　　My father had left for Beijing before I came home. 在我到家前，爸爸已经离开去北京了。
　　二、“未完成”：表示一个动作或状态在过去某时之前已经开始，一直延续到这一过去时间，而且到那时还未结束，仍有继续下去的可能性。
　　Jack 4 said 5 that he had made 6 much progress 7 in English since 8 he came here.
　　杰克说自从他到这儿以后，英语已经取得了很大进步。
　　By six o’clock these workers had worked twelve hours. 到六点钟时，这些工人已经工作十二小时了。
　　三、连词引导过去完成体用法：有些连词引导的过去完成时可互换。
　　When I reached 10 the station, the train had already 11 left.
　　=I reached the station after the train had left.
　　=I didn’t reach 9 the station until 12 the train had left.
　　=The train had left before I reached the station.
　　在我到车站时，火车已经走了。
　　四、过去完成体的虚拟用法：表示与过去事态相反的主观设想。
　　1. 用于if, if only, as 13 if引导的分句：
　　If you had worked hard, you would 14 have passed the exam 15. 如果你努力学习的话，你就已经通过考试了。
　　If I were you, I would not do it. 我要是你，就不做这事。
　　If only I had finished it before. 要是我之前完成了这件事就好了。
　　I felt as if I had been a bird in the sky.我感觉自己好似天空一只小鸟。
　　2. 用于I wish, I would rather 16引导的that从句：
　　I wished that I had knew the answer to the question before he asked me. 我希望在他问我以前，我知道问题的答案。
　　I would rather you had told me the truth 17. 我宁愿你跟我说实话。
　　3. 用于expect 18, think, intend 19, mean, want, suppose等表示过去未曾实现的希望、打算或意图。
　　I had intended 20 to buy a present for you, but I forgot 21 that. 我本打算给你买礼物的，但我忘了。
　　I had hoped 22 that we could 23 pass the exam, but we failed 24 in the end. 我本希望我们都能通过考试，但最终我们失败了。
　　因此，由上可知，比起现在完成体，过去完成体用法复杂，且具体“虚拟”的特殊用法，需要我们在平时使用中加以注意。