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问题 表示在某楼层用什么介词

The young college students occupy an office _______ the 20th floor. 填什么介词？in还是on？

问题 参加考试用take与take part in

The children said they wished they didn’t have to ______ exams.A. take    B. take part in   C. join    D. join in答案是 A。为什么不能用 B?

问题 must表示应该和必须的区别

各位老师好，在反义疑问句中，must 表示“应该”，疑问句用 mustn't （不应该）；而 must 表示“必须”，疑问部分用 needn't （不必），如 You must study hard next term, mustn't you? （应该）They must finish the work today, needn't they? （不必）可...

问题 until用于肯定句与否定式是否分别表示否定意义和肯定意义

...否定句有肯定意义吗？为什么第一句，第二句可以这样用的？老师，还有什么单词与until的用法一样的。

问题 No matter what和no matter how的用法差别

...是把how改成what，给的解释是“what在句中既引出让步状语从句，又在从句中充当are的表语；how不具备此功能。”翻语法书没找到相应知识点，想请老师帮忙解答。

问题 三个 if 从句到底是虚拟条件句还是真实条件句

But if the students keep going, if businessmen start to wobble and if cracks were to appear in the army, the revolt could enter a new phase.个人按前后文分析，认为前两个 if 句为be- 型虚拟式，第三个 if 句为 were- 型虚拟式。但有其他同学认为前两个 if 句是真...

问题 It looks as if…与It looks that…句式的互换问题

... is going to turn nasty again. 好像又要变天了。但 It looks that…的句式则比较少见，所以，请问下面的等式成立吗？We’ve missed the bus. It looks as if we’ll have to walk. =We’ve missed the bus. It looks that we’ll have to walk.有人认为等式是成立的，...

问题 ​反义疑问句用would you或wouldn't you

反义疑问句：Have dinner with us, will / won't you?可否用would you 或 wouldn't you? 为什么呢？

问题 keep后接动词用什么形式

keep sb do,keep sb to do,keep doing,keep sb doing这四种说法都对吗，都是什么意思、有什么区别？

问题 这里为什么用would

It would take me 45 minutes to get to school by bike！I would never do that.would不是用于过去时嘛，这里为什么使用would？

问题 on a cheque此处用by替换可否

there is a very firm rule that the bank has no right or authority to pay out a customer's mony on a cheque on which its customer's signature has been forged.请教下，红色部分用by cheque是否可以？谢谢！

问题 前面有数字给定范围了还可以用others么

老师，前面有数字给定范围了还可以用others么？There are fifty students in our class,some are from the USA,   (      ) are from China.OTHERS  or  THE OTHERS

问题 be afraid of doing sth 和 to do sth 辨析

教科书上例句:He is not afraid of making a speech in front of many people.请问老师，如果说成He is not afraid to make a speech in front of many people. 可以吗？二句话含义有差别吗？可我感觉书上错了，这里应该用be afraif to do...才对。

问题 interest作“利益”的单复数辨析

...interests但外刊里看到It's in your best interest to ....这里却用的单数，意思也一样是利益语料库里这个词组也多于用复数interests某采访里谷爱凌说回国是为了“a greater common interest and a greater good.”这里的利益也是单数为何会有这种用...

问题 关于不定式用主动式表被动意义

截图如下，觉得不当，辛苦专家老师解析，谢谢。