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问题 by which 是什么语法结构

向给位老师请教一下：The distance by which these accidentals change the pitch is called a semitone.这句话应该如何理解呢？我知道 accidental是升降记号的意思，semiton是半音的意思，但 by which 是什么语法结构呢？请各位老师指点一下！

问题 US（美国）前面必须要有定冠词吗

Christmas is a very important festival in Britain and US.有人认为这个句子是错的，应该在 US 前面加上定冠词。是这样吗？

问题 句中的 he knows 是插入语吗

Is this something he knows will happen?请问曹教授he knows是插入语吗？这句话的主句是什么？整个句子成分怎么分析？

问题 based on 的成分——过去分词作状语吗

Matter is grouped based on looks and actions.请问老师：based on looks and actions 在这里是作状语修饰动词grouped吗？

问题 as shown here we needed是什么意思

...视频里讲到乘飞机安全提示时，有一句话是you can release it as shown here when needed。中文字母翻译是：当提示灯显示无需系安全带时，你可根据需要解开它。我看不明白英文的as shown here we needed.这部分的表达，以及shown和needed为何使...

问题 career where（where引导定语从句）

... make a movie a financial success even when movie reviewers would not rate it highly.能麻烦老师专门分析一下这个问题吗？举例说明 career where的用法。

问题 such as 的成分问题

1. It was a newspaper of a new type, such as had never before existed in the history of the labour movement.网上这个句子中，有人分析句中单词的成分---同位语：such引导定语从句的关系代词：as定语从句:as had never existed in the history of the labour movement2. ...

问题 单词estimated的使用

...别扭，成了“估计的96%数字的肯尼亚家庭…”。不如写成It 's estimated that 96% of households in Kenya…，我觉得更通畅。请老师帮助讲讲原文里这种用分词形式estimated的表达方式。如果这种表达方式是规范符合英语表达习惯的，那请推...

问题 对大学英语课文中的一句话有疑问

课文原句是“Think in positive terms about how to address the issue rather than criticizing money spent on another program, such as America's space program, which has resulted in many positive discoveries that have benefited mankind.”这句话的中文翻译是以积极的方式思考如...

问题 主从句时态不一致的情况含义

That is what his wife said. That was what his wife said. 主句的时态分别用了一般现在时（和从句时态不一致），一般过去时态（和从句时态一致）。那么主句的两种不同的时态导致两句话的含义有什么不同呢？盼专家老师解惑。

问题 should recession strike 是什么意思

The answer is that long-dated bond offer the prospect of a bigger capital gain should recession strike.这句话should recession strike 是什么意思？不是应该是in recession strike吗？

问题 用一句话说明discover与invent的区别

请老师用一句话说说 discover 与 invent 的区别，就像 He is interested in interesting things 一样。

问题 不可数名词 precision 前怎么有不定冠词

The children's evening is regimented with an almost military precision. 请问 precision 这个不可数名词前怎么有不定冠词 an ?

问题 no和not的区别

选择题Mary is ______ hardworking than her sister. A.no less B.not less请问用not和用no 有什么区别呢？有些固定搭配Not和no可以转换，比如no more……than=not any than,但是还是搞不懂可以相互转换的条件。

问题 empty of怎么理解

China is a country of half-idled factories, of office towers emptied of white-collar staff, and restaurants without diners. 请问"empty"是不及物动词“(场所)变空”的意思吗？不及物动词可以作非谓语吗？不及物动词"empty"后面可以接“of”...