GCT英语备考：have的常见用法

语法是在职研究生容易忽略的复习内容，但是也是十分重要的复习内容。考生在做选择题的时候，如果对一些语法不了解，就可能会做出错误的选择。而如果考生做完形填空的时候对语法不了解，就不知道应该怎样选出正确的答案，可见掌握英语语法对在职研究生来说十分的重要。下面就是对于2013GCT英语语法：情态动词+ have +过去分词的复习要点，希望对考生有所帮助。

1) may(might) have + done sth, can (could) have + done sth　表示过去，推测过去时间里可能发生的事情。

Philip can (could) have been hurt seriously in the car accident.

2)　must have +done sth，对过去时间里可能发生的事情的推测，语气较强，具有“肯定”，“谅必”的意思。

—Linda has gone to work, but her bicycle is still here.

—She must have gone by bus.

3) ought to have done sth, should have done sth

本应该做某事，而事实上并没有做。否定句表示“不该做某事而做了”。

You ought to (should) have been more careful in this experiment.

He ought not to have thrown the old clothes away.(事实上已扔了。)

ought to 在语气上比should 要强。

4) needn?t have done sth　 本没必要做某事

I dressed very warmly for the trip, but I　needn?t have done so. The weather was hot.

5) would like to have done sth　 本打算做某事

I would like to have read the article, but I was very busy then.

情态动词+ have +过去分词只是英语考试中比较容易考察的一个语法，而其他的语法，考生也是应该要加紧复习的。希望2013年所有的在职联考考生都可以获得良好的成绩。