You can't go out ( ) your homework is being done答案是until,before为什么不行,

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• 用所给词的适当形式填空.有两个地方不懂.（1）If your homework ＿（do）,you can go out to play.（1）If your homework ＿（do）,you can go out to play. （2） My mother has some clothes＿（wash）every morning.我看了答案,第（1）题是is done .请问为什么不是has done.表示已经完成.have +过去分词不是表示已经完成了吗,is done和has done区别在哪,be动词+过去分词好像是被动语态的结构,那么岂不是翻译成”被完成“,还有第（2）题是to wash,请问为什么用不定式to,是有什么固定结构么?麻烦各位替小生解答,不甚感激!
• 有两个if的句子请问是什么句型?请看以下两句If you will somke so many cigarettes,you can't complain if they make you cough!If you will go out without your raincoat,you can't complain if you get caught in a shower!If you will fail to hand in your homework,you can't complain if you are punished by the teacher!Q:请问这几个句子是什么结构,为什么有两个if,而且第一个if的句子还用将来时?不解,我想问的是为什么第一个if的句子用将来时?
• until 和before的区别you can't go out ____ your work is being done是填until还是before 为什么
• ------------------------------ ---------------------------- 1 、-- Mum,can I go out and play now?-- Not ______ you have done your homework.A 、until B 、after C 、when D 、because 2 、As soon as the music stopped,every one _______.A 、freeze B 、froze C 、frozen D 、freezes 3 、-- David works ____ at school?I can ____ believe this.He used to be a lazy boy.-- People change.A 、hard; hardly B 、hardly; hard.C 、hardly; hardly D 、hard; hard 4 、-- Can’t you see?The riv
• 一道关于unless until区别的单选题下面这题-May I go out to play now,Mom?-No,you can’t go out ____ your homework is being done.A.until B.unless但是我清楚为什么不能选A.但是我不清楚为什么不能选A。之前我的提问中少打了个“不”字。不过还好大家都理解我说什么了。现在补上。
• You can't go out ( ) your homework is being done答案是until,before为什么不行,
• John,you can’t go out to play until your homework ____ (finish).用一般现在时还是现在完成时?you can’t go out to play until 可以看做将来时么?为什么资料上答案都是is finished
• You can‘t go out____your work is being done.A.before B.until C.as D.after 答案是C为什么?
• You can't go out ( ) your homework is being doneA until B since 为什么?
• 请帮我看看这几题英语语法题~----which one can I take?（d）----You can take ______ of them; I’ll keep none.A.both B.any C.neither D.all为什么（b）不能选呢?----May I go and play with Tom this afternoon,Mum?（b）----No.You can’t go out _____ your homework is being done.A.before B.as C.until D.as为啥选b啊?She is wondering ______ to deal with next.（A）A.what B.which C.how D.why
• i'm done working with you是什么意思啊?
• you can go and play it when your work_Ahas done Bis done Cwill be done哪个?