考研英语中完成时考点整理

在考研英语中，关于完成时的考查一直是语法结构中的重中之重。为此，北外网课（北京外国语大学网络课程）老师就归纳了整理了考研英语中完成时相关知识点，一起来学学吧。

完成时是时态测试的重点，注意与完成时连用的句型和时间状语：

(1)by/between/up to/till +过去时间、since、by thetime/when +表示过去发生情况的从句，主句用过去完成时。

Between 1897 and 1919 at least 29 motionpictures in which artificial beings were portrayed had been produced.  

(2)by +将来时间、by the time/when +谓语动词是一般现在时的从句，主句用将来完成时。

By the time you arrive in London, we willhave stayed in Europe for two weeks.

(3)by now、since +过去时间、in/during/for/over/thepast/last few(或具体数字)years/days/months，主句用现在完成时, 但在it is +具体时间since/before这一句型中，主句更多的时候不用完成时。

The changes that howe taken place place inair travel during the last sixty years would have seemed completely

(4)在It is the +序数词/形容词**级+that的定语从句中，谓语动词常用现在完成时。

It isn’t the first time that I have foundmyself in an embarrassing situation.

(5)在no sooner…than…,hardly/scarcely…when/before…句型中，主句常用过去完成时。

(6)其他与完成时连用的时间状语：allthis while, all this year, for some time, so far, already, before, just, long, yet等。