since前用have done 还是have been done

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• 亲们快来~几道时态填空题/这一课的题目是现在完成时.1时态填空：1）There____________(be)great changes in Shanghai during the past decade.Shanghai _________________(become)more and more beartiful .2)The German engineer ___________________(collect)a lot of Chinese stamps since he came to China,for he _________________(appreciate)Chinese history and culture2用have/has been (to) ,have/has been in ,have/has gone to 填空Where is Sara?She_____1_____Australia.Sounds great.___2_she ________2____
• 1.-Why are you in a hurry?-( )my mother is ill,I have to take her to hospital.A.For B.Since C.As D.Because2.-Hello,you look tired today.-Yes ,Ispent too late yesterdayevening.I( )my homework and forgot the time .A.was doing B.has done C.have done希望能给讲解一下.
• 两道2012辽宁高考英语单选题,求答疑33.Jack is a great talker.It's high time that he_______ something instead of just talking..It's high time that 啥意思?A.will do B.has done C do Ddid（答案D,我选A）35.Mum,I was wondering if you could lend me a few dollars until I __________ on Friday.A.get paid B.got paid C have paid D had been paid（答案是A,我选B）get ,have 搭配词组有啥区别?最好每个选项都能解释下~
• =英语一直不好的说 be后面加一个动词的过去式就是表被动?然后一般过去时的被动形式就是be+done吧?was/were +动词原形就是过去干什么什么,那was /were+动词的过去式有什么什么意思?be+动词过去式又是什么意思的说?have been done 的被动式是什么
• 情态动词加have done是什么用法啊?在什么语境下用呢?
• was/ were to have done,表示 “ 本打算 ” 、 “ 本计划 ” 或 “ 本应当 ” 做的事而没有做成或没有发生.如 :We were to have been married last year.那么以上的话要怎么翻译?到底结了还是没有?
• 初中英语语法单项选择1.More peoper came _____ I expected.A.as ; if B.so that C.since D.than2.They will be thankful for ________you have done.A.what B.that c.which D.who3.We'll go to visit the Great Wall _______ it rains tomorrow.A.since B.as soon as C.when D.unless
• 原本以为I thougut后面用一般过去时还是过去完成时?什么时候用would have done形式?
• have .since did区别have .since have done?
• have done 是现在完成时,表在过去发生的动作对现有影响.So far I have been to Beijing twice.
• 英语"It's been a long time."这句话不太理解"It's been a long time.很长时间没见了"这句话中的a long time表示很长时间,但是has been怎么表示没见了?我知道这个意思,但还是不太理解.会语法的朋友可以跟我仔细讲讲吗?
• It has been a long 我知道是“好久没见面了”但是句中并没有否定词,为什么是否定的意思呢?