作业帮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：2024/10/03 06:46:07
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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