搜狗做题网it is ...since ..为什么不用完成时
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it is ...since ..为什么不用完成时
it is 100 years since Qinghua university was found.
it is 100 years since Qinghua university was found.
句型是：It’s +一段时间+since+过去时(或It has been +一段时间+since+过去时)
1.It is ten years since she left me.她离开我已经10年了.
2.It’s a long time since our last vacation.从上个假期到现在已经很久了.
3.How long is it since we visited your mother?自从我们看望你母亲以来到现在有多长时间了?
所以也可以说：it has been 100 years since Qinghua university was found.
再问： 两者什么区别
再答： 基本没区别，一个是一般性陈述，另一个更强调时间段长度。
1.It is ten years since she left me.她离开我已经10年了.
2.It’s a long time since our last vacation.从上个假期到现在已经很久了.
3.How long is it since we visited your mother?自从我们看望你母亲以来到现在有多长时间了?
所以也可以说：it has been 100 years since Qinghua university was found.
再问： 两者什么区别
再答： 基本没区别，一个是一般性陈述，另一个更强调时间段长度。
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