关于since 用延续性动词He must have taken the book since it isn't here.he has put on weight since he gave up smoking since 主句不是只能跟延续性动词吗 这两句中为什么是短暂性动词

关于since 用延续性动词He must have taken the book since it isn't here.he has put on weight since he gave up smoking since 主句不是只能跟延续性动词吗 这两句中为什么是短暂性动词 since 后可接延续性动词么 since +延续性动词 中 since 的意思? 现在完成时since作连词时,要用延续性动词吗? 关于延续性动词.就是延续性动词可以用在不加for since的现在完成时吗?老是在选择题看见,.呵呵我是说for+一段时间或者since+一段时间- 延续性动词可以用于不+since 或者for的现在完成时态的句 有ever since或since 的句子,主句都必须用延续性动词吗? 用for或since把句子改现在完成时(短暂性动词要变为延续性动词) 过去完成时 有延续行动词?过去完成时 是不是也有非延续和延续性动词之分?是不是只有for+ 一段时间才用延续性动词?since加时间点 也用延续性动词？还有什么情况是用延续性动词的？ 用already since for和延续性动词造句用already since for和延续性动词造句 每个词10个句子 关于瞬间动词与延续性动词麻烦大家帮忙把瞬间动词、延续性动词与since for的关系理一下还有他们所用的时态since for可用于过去时吗？ It is / has been + 段时间 + since + 一般过去时,从句中的动词用延续性动词和非延续性动词有何不同请详解并举例说明,谢谢 since加延续性动词还是短暂性动词?for呢? 关于since+延续性动词的问题since后面接的句子若用延续性动词,则中文意思与字面意思相反比如说：It had been many years since they had lived there.意思就是他们已经很多年没在这里居住了那么高一必 since和for主句都用现在完成时,都用延续性动词吗 since引导的时间状语从句主句用延续性还是瞬间性动词 for也和since一样,主句也用延续性动词吗 we don't know what has happened since yesterday since 不是跟延续性动词吗为什么用has happened是不是happen也可做延续性的， 现在完成时中since后加点动词,那since前的谓语动词有怎样的要求呢?用点动词还是延续性动词？