全国大众英语测验语法——模样形状动词+have+过往分词
1) may(might) have + done sth, can (could) have + done sth默示过往，料到过往时候里年夜概发作的事变。
Philip may (might) have been hurt seriously in the car accident.
Philip can (could) have been hurt seriously in the car accident.
2)must have +done sth，对过往时候里年夜概发作的事变的料到，语气较强，具有"一定"，"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，而毕竟上并没有做。否定句默示"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.（毕竟上已扔了。）
ought to在语气上比should要强。
4) needn't have done sth本没需要做某事
I dressed very warmly for the trip, but Ineedn't have done so. The weather was hot.
5) would like to have done sth本打活动看成某事
I would like to have read the article, but I was very busy then.

关键字：语法 模样形状动词 英语语法模样形状动词 模样形状动词 have done 模样形状动词 模样形状动词的用法