The students _were talking_________(talk)loudly when the tea

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The students _were talking_________(talk)loudly when the teacher came in为什么?

The students （were talking） loudly when the teacher came in.
当老师进来时,学生们正在大声谈话.
when引导的时间状语从句是一般过去时态,主句为过去进行时.表示“当某事发生时,某人正在做……”.
再问： 1Mr smith _has worked_____ (work)in this factory since he ___came__ to china 2—______they _____(see)the viedo? — Never. 解释
再答： 1、Mr Smith （has worked） in this factory since he （came） to China. 自从史密斯先生来到中国，就一直在那家工厂上班。解释：since引导的是延续性的时间状语，表示从过去延续至今。从句用一般过去时，主句为现在完成时。 2、—（Have） they (seen) the viedo? — Never. 他们看过那个录像吗？没看过。解释：这句表示截止到目前（没）做过某事。答句的完整回答是They nave never seen the video.也是现在完成时态。

The students _were talking_________(talk)loudly when the tea Students ( )talk loudly in the library. When the teacher came in ,the students stopped ______(talk ) The students stopped______(talk)when the teacher came in. All the students stop__________(talk)when the teacher comes Many students( )(talk)when the teacher( )(come)into the clas 问时间状语从句前后时态的问题：The students_____(talk)loudly,when the teache Don't talk loudly in the hallway. The students _____(talk) about the film when the teacher cam The students usually stop to talk when the teacher comes in When the teacher comes in, the students stop ( ). A.talk B.t 改错the students stopped to talk when the teacher came in