语法一直是学英语的难题，但打好语法基础对提升成绩至关要紧！新东方在线记者为大伙整理了2024年12月英语四级语法系统复习：情态动词+have+过去分词，期望能为各位考生提供参考和帮助。
2024年12月英语四级语法系统复习：情态动词+have+过去分词
1) may have + done sth, can have + done sth表示过去，推断过去时间里可能发生的事情。
Philip may have been hurt seriously in the car accident.
Philip can 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断，语气较强，具备"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，而事实上并没做。否定句表示"不该做某事而做了"。
You ought to have been more careful in this experiment.
He ought not to have thrown the old clothes away.
ought to 在语气上比should 要强。
4) neednt have done sth 本不必做某事
I dressed very warmly for the trip, but Ineednt have done so. The weather was hot.
5) would like to have done sth 本计划做某事
I would like to have read the article, but I was very busy then.
以上就是新东方在线记者为大伙收拾的“2024年12月英语四级语法系统复习：情态动词+have+过去分词”的全部内容啦，预祝各位小伙伴顺利通过四级考试！