when do we have to be doing the research?有谁能解释一下这个句子的语法吗?特别是"be doing"这里 是什么时态?

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whendowehavetobedoingtheresearch?有谁能解释一下这个句子的语法吗?特别是"bedoing"这里是什么时态?whendowehavetobedoingtheresearc

when do we have to be doing the research?有谁能解释一下这个句子的语法吗?特别是"be doing"这里 是什么时态?
when do we have to be doing the research?
有谁能解释一下这个句子的语法吗?
特别是"be doing"这里 是什么时态?

when do we have to be doing the research?有谁能解释一下这个句子的语法吗?特别是"be doing"这里 是什么时态?
什么时候我们必须做研究

被动,不是现在进行时。
we 和 research是被动关系

When do we have to give______our compositions When do we have to give______our compositions?为什么? The next important question we have to decide is when do we have to submit the proposal.为什么这么改do we have to-----we have to he wanted to know when________ the English partyA.when will we have B.when we will haveC.when would we haveD.when we would have I think it's useless ___ when we have made mistakes.All we can do is to correct themA complaining B complained C having complained D being complained What do we have ( )dinner?A.TO B.FOR do you know什么at8:00am a:who to talk wath b:when to have a meeting c:when shall we have a md:where can have a meeting Do you know ____ have our summer holiday?next week. A.when we will B.when are we C.when will weD.when we are 1.We are going to have fun______English this term.A.learn B.learning C.to learn D.have learned1.We are going to have fun______English this term.A.learn B.learning C.to learn D.have learned2.She doesn't____to do and when to do itA.what B.how C.that D. We have funWe have fun_____sports.A,do B,doing C, to do D,does What else do we have to do? Do you know_____for advice when we have problems?You can talk to your parents or teachers A wDo you know_____for advice when we have problems?You can talk to your parents or teachersA who to talk B who we can talk C who to talk to D who can we talk t We have put off the get-together until next weekend ______ we won't have so much work to do.A....We have put off the get-together until next weekend ______ we won't have so much work to do.A.which B.where C.that D.when为什么不能选C?那么that when do you think_go hiking?A we shall B we are going to 去年中考英语选择题一道 说明原因 He want to know______the English party.A when will we have B when will we have C when would we have D when we should have what should we do when we have a fever ?/是什么意思 What should we do?when we have the fever ( )do we have chinese this morning?A.who B.what C.when D.how