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句式提取:完成时+ever since
ever since从那时起;……以来,通常与完成时连用。since可单独使用,其后跟从句或省略的从句。
常用句型:
It is/has been+一段时间+since+从句(从句用一般过去时)自从……有多长时间了
It is/has been 3 years since I joined the army. 我当兵已经三年了。
【活学活用】
(1)It is/has been 3 years since I ________________________.
我不当兵已经三年了。
(2)John promised his doctor he would not smoke,and he has never smoked ________________.(2008·北京,21)
约翰答应医生他不再吸烟了,从那以后,他再也没有吸过烟。
(3)His sister left home in 1998,and__________ ever since.
A.had not been heard of
B.has not been heard of
C.had not heard of
D.has not heard of8.Although she didn’t know the best way of getting to places,she insisted that she organize the trip properly.
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