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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 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 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 another 后面若是字母怎么办？

This word is spelt wrongly. There should be another's 这个单词拼错了，应该还有一个S。 题上写的是‘s，不知道这种情况下怎么写，请教老师。 谢谢老师。

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 同位语从句是否省略引导词

请教老师同位语从句是否在有些情况下省略引导词？印象中不能省略。如果能省略，原因是什么？There is no doubt you'll win.这个句子对吗？ 我在新闻有见到省略的情况 There's no guarantee their expenses will be paid.

问题 face的主语能是物吗

one of the problems facing mankind today is racism. 这句话中的facing与mankind主谓关系是什么特殊用法吗？另外，face的主语可以是物吗？比如to alleviate the challenge facing the special problem中的facing是challenge的定语吗？

问题 what to do是省略了什么东西吗

原句：What to do when you know the worst is coming.这里主句为什么没有谓语动词呢？

问题 Invited Talk 的语法分析

...为 speakers who are invited，但 invited talk 不能解释为 talk that is invited 吧？

问题 关于同位语从句和定语从句

The suggestion where we should exercise regularly is very practical.这个句子看做是同位语从句能理解，但是个人觉得也可以看做是定语从句。We should exercise regularly in this suggestion. 在这个建议中我们应该经常锻炼。为什么这样理解是不对的呢？

问题 固定搭配：work hard at sth还是work hard on sth

I must keep on working hard ________ it. 请问应该填on, at还是都对？

问题 would have been该怎么理解

How long do you think it would have been before your lie was discovered?这句话理解不好这个would have been，我能分析出从句用了was discovered是表示谎言在说话时已经被揭穿了，但是这里的would have been就让我的思维彻底乱套了，这到底是表示在现在...

问题 others还是the others

您好，请看下面句子It was Monday morning, and the writing class had just begun. Everyone was silent, waiting to see who would be called upon to read his or her paragraph aloud. Some of us were confident and eager to take part in the class activity; others were nervous and anxious.是否应...