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问题 after是作副词用吗

I could come next week, or the week after.His people loved and remembered him for centuries after.老师，如何理解 after 是什么词性？

问题 What kind of books is on the third floor谓语动词用单数对吗

刘老师，我之前也问过其他老师，有的说谓语用单数，有的说谓语用复数。我现在也搞不明白了，只好请教您了，您是权威。

问题 in British pay 中的 pay 为什么用原型

A German army in British pay, and commanded by the “Butcher” hero of Culloden, was beaten in July, and capitulated in September.请问句中的 pay 为什么用原型？

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 与 first 搭配用什么介词

_____ first, he could speak little English.A. In    B. On    C. At    D. From

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 let alone（更不用说）后接动词用什么形式

let alone（更不用说）后接动词用什么形式？比如下面一题：The baby can’t even sit up yet, let alone _____ (walk).该填不定式？动名词？过去式？还是……

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 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 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 ​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 条件句

老师，条件状语从句又分为：零条件句、第一条件句、第二条件句、第三条件句那么对于主句使用情态动词或祈使句，从句使用一般现在时，这样的句子属于哪一类条件句？1 If you lose weight, you must eat less meat.2 Market your product if yo...

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？