小升初语法必备 since的用法及练习题

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　　since的四种用法(***)

　　1)since +过去一个时间点(如具体的年、月、日期、钟点、1980, last month, half past six)。例如：

　　I have been here since 1989. 1989起，我一直在这儿。

　　2)since +一段时间+ ago。例如：

　　I have been here since five months ago. 我在这儿，已经有五个月了。

　　3)since +从句。例如：

　　Great changes have taken place since you left. 你走后，变化可大了。

　　Great changes have taken place since we were here. 我们走后，变化可大了。

　　4)It is +一段时间+ since从句。例如：

　　It is two years since I became a postgraduate student. 我考上研究生有两年了。

　　历年真题：

　　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.(其余三组动词均为瞬间动词，不能和段时间连用。)

　　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.