seen是see的什么时态

seen是see的什么时态 seen后面加动词的什么时态 see后面+什么时态? 关于不定式用法The young man was seen ____ into a police car just a few minutes ago.这里的空不能用不定式的原因是?是不是时态的什么问题?什么时候的see sb do可以改成be seen to do? because原因状语从句 时态配合I didn't go to see the filmbecause I __________(see) it before.我认为空格处应该填had seen,因为主句用的是一般过去时,但答案是have seen.为什么不需要进行时态配合? 请教关于see在完成时态的用法!SEE是短暂性动词 一般不能用于持续性的有for和since词组的完成时态中但是为什么这句话成立?I haven't seen you for years!(或I haven’t seen you since last year!)这算是习惯性 seen是see的过去分词,那saw是? have you seen my food?什么时态 why don't you go to the movie with me ?because I ___it twice.see will see saw have seen 选哪个呢?为什么呢?什么时态呢? saw 跟seen有什么不一样?saw是SEE的过去式,SEEN也是SEE的过去式,他们两个有什么不一样?还有别的动词也是,像break的过去式broke和broken I felt shocked,后面是when I see么?see用什么时态啊? see的现在进行时态 I was really surprised at what I _______(see).是填saw还是had seen?为什么》《教学案上前面说的是【当主句为一般过去时,从句用相应的过去时态】我觉得had seen好像读进去比较通顺诶. I haven't seen (not ,see)him since i came here时态转换是否正确？ 句话 用什么时态正确啊/when you see this message,I have left whent you saw this message ,I have let请问,从句的时态该怎么用啊?用 see,还是saw ,那个是对的. I have ever seen和什么时态连用 就是can't have seen 我觉得它的结构应该跟couldn't have seen 一样,而只是时态不一样而已,你认为囊 还有和couldn't see的区别, Children can be seen playing with them a few days before Mid-Autumn night.上面的句子是什么时态?be seen playing用了什么短语吗?