【高考英语语法】needn't have done用法！今天开始学习情态动词+动词完成式，不会的学生抓紧时间学习！

　　"情态动词+have done"是情态动词的一个十分重要的结构，昨天学习了must have done的相关知识，今天学习下一个needn't have done 。

　　D：needn't have done

　　用于对过去的责备，表示"没有需要做某事，可是做了"。

　　The airport is close to us. You needn't have hurried there early.机场离这儿很近，你没需要早早地赶到那里。(可是你早早地到那儿了)

　　He is still young. You needn't have sent him such an expensive present.他还小，你没需要送他这么昂贵的礼物。

　　注意：

　　如表示"过去不必做也没有做"之意，需用didn't need to do。

　　It is not cold today. I didn't need to take the thick sweaters out.今天天气不冷，我没有需要把厚毛衣拿出来。(实际上也没拿)