since主句中带的动词时延续性还是瞬间性my friend died since last week it's two weeks since my father died 这个为什么是对的?所以根据问题主句的动词要延续性还是瞬间性.
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/09 14:36:18
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