【小編寄語】今天查字典英語網小編教給同學們的是小升初語法必備 since的用法及練習題，一起來學習下吧!祝同學們學習進步!
since的四種用法
1)since +過去一個時間點。例如：
I have been here since 1989. 1989起，我一直在這兒。
2)since +一段時間+ ago。例如：
I have been here since five months ago. 我在這兒，已經有五個月了。
3)since +從句。例如：
Great changes have taken place since you left. 你走後，變化可大了。
Great changes have taken place since we were here. 我們走後，變化可大了。
4)It is +一段時間+ since從句。例如：
It is two years since I became a postgraduate student. 我考上研究生有兩年了。
歷年真題：
1. He has ____ the army for ten years and now is an officer.
A.gone into
B.joined in
C.been in
D.come into
答案：C.
2. You don't have to describe her. I _____ her several times.
A.had met
B.have met
C.met
D.meet
答案：B.
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