It was quite a long time__________I made it out what had happened.A.afterB.beforeC.whenD.since-英语

题目简介

It was quite a long time__________I made it out what had happened.A.afterB.beforeC.whenD.since-英语

题目详情

It was quite a long time__________I made it out what had happened.
A.afterB.beforeC.whenD.since
题型:单选题难度:偏易来源:不详

答案

B
在“It+be+时间名词+before/since”从句句型中,连词before与since极易混淆。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,其句意是“自从……以来已经很久了”,主句中的be动词多为现在时(或现在完成时)或一般过去时(此时since从句要用过去完成时)。

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