It's a week since he went to BeiJing.请问 这里It's是不是指It is?
问题描述：
It's a week since he went to BeiJing.请问 这里It's是不是指It is?
答
不是
是It has been
漏了一个been
现在完成时
答
是的,为动词
答
是的 这是个固定结构 It is+段时间+since+过去式的句子 某人做某事有什么时间了