小升初语法必备 since的用法及练习题　　【小编寄语】遥查字典英语网小编教给同学们的是小升初语法必备 since的用法及练习题，一起来学习下吧!
祝同学们学习进步!
　　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.