since引導(dǎo)的從句用一般過(guò)去時(shí),對(duì)應(yīng)主句用現(xiàn)在完成時(shí),has been可以換成is
since意思是 自從...到現(xiàn)在.
it is four years since I joined the army.這里的is,為什么不用was呢?
it is four years since I joined the army.這里的is,為什么不用was呢?
英語(yǔ)人氣：981 ℃時(shí)間：2019-11-04 14:33:21
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