didn't和haven't什么有区别还有hadn't

来源：学生作业帮助网 编辑：作业帮 时间：2024/04/28 22:58:23

didn't和haven't什么有区别还有hadn't
didn't和haven't什么有区别
还有hadn't

didn't和haven't什么有区别还有hadn't
didn't是不,过去式
haven't是没有,一般现在式
hadn't也是没有,过去式