看到一句It is 3 years since he joined the army.和一句It has been three hours since he left his office. is和has been可以互换?
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/04 01:54:46
![看到一句It is 3 years since he joined the army.和一句It has been three hours since he left his office. is和has been可以互换?](/uploads/image/z/7459778-2-8.jpg?t=%E7%9C%8B%E5%88%B0%E4%B8%80%E5%8F%A5It+is+3+years+since+he+joined+the+army.%E5%92%8C%E4%B8%80%E5%8F%A5It+has+been+three+hours+since+he+left+his+office.++++is%E5%92%8Chas+been%E5%8F%AF%E4%BB%A5%E4%BA%92%E6%8D%A2%3F)
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来源:学生作业帮助网 编辑:作业帮 时间:2024/08/04 01:54:46