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

I think we have met some where and We ( )(not) have ( )(some) lessons on saturday? 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 We were both__when we met again because we have not seen each for a long time we met each other not long ago.同义句：we have _each other ________. 填空we have not met before.we are s_ to each other I have seen you around the office,but I do not think we are met.翻译 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 We have some apples.变否定句是不是We have not any apples. Our hands have met but not our We （have been） good friends since we met at school.为什么用have been?还有Why not (go) to the cinema with me?为什么用go? 改错题:We have not met each other for about 20 years since we have left Japan.这个句子哪里错了? I don’t think we have met before.I’m afraid you’re confusing me with ______A.some otherB.some other personC.other personD.one other 1.Tony h__ learnt some Putonghua since we stayed at his home.2.--Have you ever learnt Cantonese brfore?--NO,N__3.hAVE YOU SEEN THE DRAGON BOAT RACE.I know the man.I've a__ met him before.3.hAVE YOU SEEN THE DRAGON BOAT RACE y__?No,not y__ We have some pens .（改为否定句） We have not any pens.还是 We do not have any pens .对呢? We have been good friends since we met at school. we have not 缩写 at the party ,we met some b___ scientists