may问,什么答好象是must那 must 什么答

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• may问,什么答好象是must那 must 什么答
• — May I 类型问句1)—May I —No,you mustn't / can't.2)—Must I —No,you needn't / don't have to.这2个问答句为什么不能直接用什么问就用什么答?（这一问最重要）Many thanks!
• 几道英语选择题,--（ ） I visit Lucy on Sunday,Mom?--Yes,you ( ).A.Must can B.May be C.Need need D.May need--Not only we but also she ( ) been to the Great Wall before.A.has never B.has ever C,have ever D.have everI like writing my original sentences( )the grammer I have learned.A.used B.use C.to use D.using第一个题目选B,为什么?第二个题目选A,为什么不选B,好像也可以?第三个题目选D.我想知道的是这个句子的结构成分,"using the grammer',在句子充当什么成分?答得好有奖励哦.呵呵.
• Where is Jack?I can't find him anywhere.he___his homework upstairs.A must have done B must be doing我知道这里应该选择must be doing 理解为他正在楼上做作业.可是为什么不能选择must have done呢?这里不是问JACK在哪里吗?那应该表猜i测阿.must have done 不就是表猜测的嘛.如果不是的话,在哪种情况下用must have done 比较合适?
• You____return the book now.you may keep it a little longer.A.needn't to B.don’t need to请帮忙分析a 和d 的区别,有人告诉说,don‘t need 用作及物动词,后面可直接加宾语,请问这句话对吗,那这道题不就应该选c吗,所以我觉得他说的不对,求光大网友解惑,请别所问非所答.悬赏50分,快速,needn’t 怎么不对那,请问这句话中,宾语是什么.
• The light is on.There must be someone in the office?请各位不要所问非所答!1.The light is on——是:原因状语,用于修饰全句;还是:它在句中为独立成分的句子.2.在该there be 句型中"主语"是什么,我认为是"someone",如果不是那么"主语"又是什么呀?3.in the office——是“地点状语”用于修饰："must be"还是"be"还是“全句”
• 英文句子I must admit,it is more difficult than i thought it would be句子最后的would be有什么用?为什么最后要+上would be?51问51问，那为什么一定要would be ,could be行吗？
• may问,什么答好象是must那 must 什么答
• 问一道英语题（有关情态动词）——Could I take this seat,sir?——Yes,you_______.A.could B.must C.need D.may这里答案是D,可是为什么不能选A呢?用could提问可以用may回答吗?那用can体温也可以吗?
• 问几道英语题阿,1.—_____will the concert begin?—______seven o'clock.A.how long;not until B.hong long;until C.how soon;not untilD.how soon;until2.We'll do what we can _______you with your English study.A.to help B.were left C.had left D.left3.Alice has been in China for several years.She _____be a big girl now.A.need B.must C.can D.may这集体都拿不准,谢谢回答,（选什么,为什么）
• 为什么说 天时不如地利 地利不如人和 是孟子观点的具体体现
• 已知(a+2b)/（c+1）=b(b不等于0）,用含a,b的代数式表示c为多少?