用have been doing 句型早十句话!

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• 麻烦请将英语的几种语法用英文表达出来.例如，have been doing 是属哪种语法分别代表什么意思？
• They can't have been doing thier homework.have been 是现在完成时,但是后面do为什么要变成doing?They can't have been doing thier homework.这句话 have been 是现在完成时,但是后面do为什么要变成doing?为什么不用do呢?还有They must have been playing in the garden.为什么也用playing,而不用play呢,
• 把下列句子由主动语态改成被动语态,或由被动语态改成主动语态1.Did Tom repair the car yesterday?2.The curtain in the room has been taken down. They___________________________(用所给句型改)3.Millie has donated $210 to the students in poor areas.4.Have they built another bridge in their town?5.You may write the letter in pencil.
• Due to the heavy rain and flooding,ten million people have been force-----their homes.A.leaving B.to leave C.to be left D.being left 为什么不选A? 为什么选B?一般什么时候 用 TO DO 什么时候用DOING 啊 ？这个有什么特定规律么，还是只看动词前的词组？
• 关于IF条件句if条件句中did would do 表与现在事实相反的猜测had done would have done 表与过去事实相反的猜测那么 did would be doing 与 had done would have been doing表示什么呢再顺带问一个问题 my favoutite animal is pandas 还是 my favourite animals are pandas 还是 my favourite animal are pandas还有两个不可数名词谓语动词用什么 如 milk and bread is/are my breakfast
• 在Up to now 之类的句型里 ,什么时候用完成进行时,什么时候用现在完成时比如说 Up to now I have been reading this book.和 Up to now I have read this book.是不是 ,只有一个区别就是前者包含还要读下去的意思而后者没有
• 问一个英语句子,谢谢大家!有一些能保持健康和有一个好身体的建议 there are some advices keeping healthy and have a good body 请问对不对 错的话用There be + 主语 + doing +介词短语 句型的话怎么改? 谢谢
• 汉译英:这些年来你一直在干什么? 书上翻译是：What have you been doing all these years?请问：1.这句话明明是过去完成时,为什么翻译用过去完成进行时?你过去一直在干什么,只是过去啊,难道你将来要干什么也包含了吗?可以改成：what have you done all these years?吗? 2.句子中的all有什么用?可以直接去掉吗?
• 两个句型转换~1.While some of the Aboriginal languages have been lost,people are trying hard to protect and record what is left.____some of the Aboriginal languages ____ ____ ,people are trying hard to protect and record what is left.2.We benefit greatly from doing morning exercise.Doing morning exercise___ us____ ____ ____ ____.(4空)
• 用space museum .amusement park .aquarium .zoo .water park .这几个词造句.用have的句型列如：have you ever been to an amusement park？NO i have't park?说一段对话
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• 有时候英语的单词有一词多意的..那是不是具体什么意思就要看句子吖..