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if后面的动词形式变化 1、问句提问中,两个不可数名词（如air and water)和在一起,前面的be动词应该有单数还是负数?回答时呢?2、问句提问中,两个可数名词在一起,前面的是单数,后面的是复数,be动词应该有单数还是负 if后面跟动词什么形式 中国书 用 英语怎么 写...是 chinabook 我决的不对阿.那 chinabook 这个词， 用（can't ） （ have been/done ） （must have been /done） 改写句子例：I don't believe he did it 答:He can't have done it问：I don't believe you tried very hardI think he passed all the examsI don't bellieve you were at the office on 括号怎么填写? 鹿和狼的故事 阅读短文,回答问题描写鹿的词语：描写狼的词语：为什么“到1942年,整个凯巴伯森林中只剩下不到八千只病鹿在苟延残喘”?造成这种状况的直接原因是 和 ,而根本原因是 person的第三人称快 if后加动词的什么形式如题 Could have been who helped Suny get her work done?Could have been who helped Suny get her work done?A they...it B they...them C it...them D it...they选什么？为什么？ 8.Could __ have been ____ who helped Sunny get her work done?A.they ,itB.they ,themC.it,themD.it,they为什么不是其他选项?尤其是C? Could _ have been _ who helped Sunny get her work done?A.they ,it B.they ,them C.it,them D.it,they 答案是 D为啥? French作名词用可以指“法国人”吗?相当于frenchman吗? 我想问新概念第一册有一句话是 Are you french,too?French表达的是法国人,为什么不变为Frenchman 呢急,麻烦快 详细点说好么 the summer my grandmother was supposed to die 的中文翻译 在四边形ABCD中,∠BAD与∠ABC的平分线相交于点E,试找出∠AEB与∠C,∠D的关系,并证明你的结论. grandmother翻译成中文 在四边形ABCD中,∠BAD,∠ABC的角平分线交于点E,试找出∠AEB与∠C,∠D之间的关系,并证明你的结论. i kinda liked when you put it in my behind是中文翻译什么意思? 四边形abcd中,角bad和角abc的平分线交于点p试判断角apb与角c角d之间的关系并说明理由 英语翻译当中的hand down from 具体怎么翻译 if只能跟在动词后面吗?也就是说I am not sure ______ he will come here.不能用if,只能用weather, if作“是否”讲时,常位于哪些动词后? mind后加if引导的从句则动词用什么形式?你介意我再吃一块蛋糕吗?_____ you _____if_____ _____another cake? 【句型转换】I have a headache .(变同义句) I ----- ----- a headache. 英语作文!think of favourute food in hometown.make a list of ingredients on my way to school 怎么写? Learning English and having English names ______ both popular,( are/is) on my way to school60字,只能有三个 l see 开头的句子,要有复合句. A police c___ a thief.How ___ to take the thief to a prison.O___ their way,t___ thief says to未完the policeman,"please wait me f___ some time,sir.I want to buy some bread.""I'm not a fuul,"syas the p___."you want to run away,d___ you?""No,but..."sa ____recent report says that all ___sea water will be polluted by 2040.A The;the B The;×C A;theD A;× latest与recent有和区别谢谢啦