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问题 过去多久算过去时？

He says he is tired. He said he was tired. He said he had been tired. 请问老师这三句话怎么理解？我完全不明白第 1 句和第 2 句。他说自己累，这个说的状态一旦形成不就是过去了吗？不过去就没有说啊~! 怎么会有says呢？ 我好像陷入...

问题 a practice fire drill中的practice是不是多余的

有一段英文广播说: This is a practice fire drill. 这是消防演习。(有附英文transcript).我的问题是: fire drill 已经有消防演习的意思，所以 practice 是多余的。请问对吗?

问题 在下列句子中that's why 后是什么句型结构

在下列句子中that's why 后是什么句型结构:That's why my administration is doing everying we can to reverse this trend and promote more competition in the marketplace.

问题 as...as中的第二个as到底是什么词性

We know, doing your taxes is as much fun as having a root canal or passing a kidney stone.上文中的第二个as为什么接了一个名词，第二个as不应该是连词吗，应该接一个句子。谢谢老师。

问题 关于定语从句与结果状语从句的区分

有这样一道题：Mr Smith is _____ a good teacher _____ we all respect. A. such, that     B. such, as       C. so, that        D. so, as答案是 B。书上面的分析是说要区分好定语从句与结果状...

问题 时态对比填空（涉及一般现在时和一般过去时）

The braised beef _____ (be) lovely, but I'm afraid i can't have more.The braised beef _____(be) lovely, and I want more, please.老师们好，请问这两道题，为什么一个填was, 一个填is ?

问题 关于两个名词或词组是否加of问题

...么可以能不加of，但是这句话。  the predonminant one is climate change.   为什么不写成the change of climate.   请老师给一些经验，什么时候加of， 什么时候不用加。最好能有例子。感谢

问题 有关how引导宾语从句的问题

Far less certain,however,is how successfully experts and bureaucrats can select our peer groups and steer their activities in virtuous direction.给出的翻译是：我们远不能确定，专家官员。。。（做后面那些事）能有多成功。为什么不能翻译成：我们远不能确...

问题 "插入语"疑问

The tight grip which big tech companies have over user date is what has turned them into entrenched, and perhaps abusive, incumbents.请问老师，最后的and可以去掉吗？"插入语"（我不知道这个现在叫啥名字了）不是不做句子成分吗？and难道不是把它跟前面的adj...

问题 宾语从句陈述句语序

Mr, Black asked his son__________A. what's the matter with him.               B. what was the matter with himC, what the matter is with him               &n...

问题 比较句than I have和than mine含义有差别吗

He has a bigger dog than I haveHe has a bigger dog than mine (is).请问老师，这2句含义有差别吗？

问题 not but not后的成分和 but后的成分必须一致么

 如He is not happy at all but crying for freedom. 这句对么？谢谢老师了！

问题 changing demand 动名词短语使用疑惑

Contributing to the steep price drop is changing demand both domestically and internationally.造成价格急剧下跌的原因是国内和国际需求的变化。这里的changing demand是动名词短语吗？可以说成demand change或demanding change或demand changing吗？这些changing demand...

问题 句子成分分析

1.But this is just part of the "Made in China 2025" model,which has called for at least 70% of related high-tech materials and products,such as semiconductors,to be made domestically by 2030.这里不定式做状语，其逻辑主语是谁呢2.Indeed,the sheer depth of the scheme has trigg...

问题 who 先行词的使用

...马上要面对的93年以后的人。Due to the little understanding of his ambitious claim of speech right, you fail to allow him equal voice, but who is exactly one of the generations born after 1993 that we are going to deal with in the workplace. 老师，请问who在句子里的用...