摘要： It was quite a long time I made it out what had happened. A. after B. before C. when D. since 选B.“It + be + 时间名词+before / since 从句句型中.连词before 与since 混淆.用before引导时.句意是 “过了多久才-- .主句中的be动词为过去时或将来时态,用since引导时.其句间是“自从--以来已经多久了 .主句中的be动词多为现在时或一般过去时(此时since从句要用过去完成时).
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It was quite a long time I made it out what had happened.
A. after B. before C. when D. since
查看习题详情和答案>>It was quite a long time_________I made it out what had happened.
A. after B. before C. when D. since
查看习题详情和答案>>It was quite a long time_________ I made it out what had happened.
A. after B. before C. when D. since
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