Is/Are supposed to do 与Was/Were supposed to do 的区别是什么?具体用法?

Is/Are supposed to do 与Was/Were supposed to do 的区别是什么?具体用法? you ____ hand in your papers when the class is overA will have got to B are supposed to C are meant to D all the above be supposed to的用法问题RT was supposed to 和 were supposed to 的情况但感觉它和should差不多,should一般不出现过去式.所以be supposed to一般只用 is/are supposed to (2/3) be there now .A suppose to;B are supposed to;C supposed to;D were was/were supposed to do 和is/are supposed to have done是一样的意思吗?You are supposed to have met me here You were supposed to meet me here ---You ___ part in the party in time.---Sorry I was delayed by the accident.A.are supposed to take B.have supposed to C.are supposed to have take D.supposed to take为什么,请解析, If you go to Beijing,you’ll find the places there are more magnificent than commonlyA:supposing B:supposed C:to supposed D:supposed is supposed to怎么读? They_ to be here an hour ago.A:suppose B:supposed C:were supposed D:are supposed应该选择哪项,原因是什么!谢谢各位 Usually people in Japan and korea ___ bow when they meet for the first time,A,are supposed to B,are supposed C,supposed D,supposed to选什么,为什么,什么意思 -----You _____ here in time.----Sorry,I was held up by the accident.Aare supposed to have arrivedB.are supposed to arrive C.have supposed to arrive D.supposed to arrive we to get to the bus station at 7 o'clockA.supposed B are supposed c will suppose D should be supposed 为什么选B啊.we———— to get to the bus station at 7 o'clock A.supposed B are supposed c will suppose D should be supposed A Mexican is supposed to hug when he meets his friend for the first timeA Mexican is supposed为什么用is不用are啊? Christmas is __ special holiday when __ whole family are supposed to get together.填什么 how dirty it is you are supposed to take out all the r______ in your bedroom Be (is was are were)supposed to be 求3个例句谢谢大家 You are supposed to shake hands. 英文翻译Who are you supposed to be