have we met before have you seen me这两个句子有什么区别?主要是想知道用的场景

I think we have a met （s ） before. we I know somewhere have before met you怎么连 We may ____each other somewhere before.A meet B.met C.have met i dont think we have met before 中为什么不用had met 填空we have not met before.we are s_ to each other Have not we met somewhere before?这是什么结构 have not 做主语是怎么回事 怎么翻译 关于英语语法Have we met before?翻译成“我们见过吗?”,这是什么语法,如果变成陈述句的话就应该是We have met before.为什么用完成时啊? A:“are you sure we have not met before” B:“yes,certainly we have.we met here last year...A:“are you sure we have not met before”B:“yes,certainly we have.we met here last year”两个人见过,为什么b要说yes?按照中文翻译过来 have we met before have you seen me这两个句子有什么区别?主要是想知道用的场景 It is really quite extraordinary that we should have been at the same college without ______ before.a.met b.being met c.ha ving met d.having been met It is really quite extraordinary that we should have been at the same college without ______ before.a.met b.being met c.having met d.having been met 30.I don’t think we have met before.I’m afraid you’re confusing me with ______. I don't believe we have met before,.I must say do look familiar.为啥用although不用therefore Have you met him?Yes,I have just met him.I had never met him before.的中文意思.见题. Have you met him?Yes,I have just met him.I had never met him before.如何翻译? l have met him three months agol met him three months ago改成I have met him three months before i have been waitting all my life before i met you have never met each other before,( 反义疑问句