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问题 used to的用法与理解

Planes, helicopters used to fight the fire句子来自2019版人教版高中英语新教材必修一的 Unit 3（p49）。请分析used to 的用法，好像句意有点奇怪。

问题 phonetic system什么意思

这里的phonetic system什么意思？音系？written script什么意思？如何理解？如何翻译了？When Wang developed his Mandarin Alphabet, his contemporaries were still debating whether the written script should be superseded by a phonetic system—like Romanization.

问题 逗号后的不定式作什么成分

These people left the village, never to return.请问这个逗号后的不定式作什么成分？

问题 时态(have done)的分析与理解

Sub zero temperatures in Harbin's Songhua River have done little to curb enthusiasts.我想问这里为什么是 done？这里的done是什么用法？并且这里的 done 要怎么翻译呢？

问题 为什么 way 不用复数形式 ways

Because they have to spend hours trying to make their way in heavy trafic.  在这句话中，为什么way 不用复数形式 ways?

问题 英语难句分析(来自《​人性的弱点》)

人性的弱点的一句话：Three important manufacturers had worked up fabrics in sample bodies. 请问这句话怎么理解？我看很多地方都翻译成三家制造商提供了样品之类的，但我毫无头绪。

问题 marked by great innovations什么意思？

Humans have conquered their surroundings and overcome their limits in leaps and bounds marked by great innovations.请问marked by great innovations什么意思？

问题 对“一位朋友的问题”的补充(续)

Tom has gone out. Tom _______. A. was out B. has been out C. is off D. will be out ▲在《朗曼英汉双解词典》的out条下有这样的例句： I'm afraid Mr Jones is out / has gone out; he'll be back soon. 我恐怕钟斯先生出去了，他很快就会回来。 ...

问题 主语+不及物动词+介词短语(which非限制定语从句,which指代问题)

...ly there are memory consolidation processes that occur across periods of wakefulness, some of which neither depend on nor are enhanced by sleep. 主语+不及物动词+介词短语，which非限制定语从句。请问老师，这样的结构从语法的角度来说，which应该既可以...

问题 ccording to不宜用作表语吗

误：The news is according to Hong Kong's broadcasting station．这个句子错在哪里？有人认为句中的 according to 用得不妥，它不宜用作表语，是这样吗？

问题 一个简单句子的成分理解与分析

The Vermont Senate voted 26 to 4 last year against allowing an extension.问题：26 to 4 last year 在句子中是什么成分？vote 是及物动词还是不及物动词？

问题 请问这里的at all是什么意思?

Did the van slow down at all?翻译：货车减速了吗？请问这里的at all是什么意思?

问题 taking place 句子中的成份

The meeting taking place at this moment is sure to be a great success.请问老师这里的taking place是什么成份？

问题 how many的省略及分析

The hotel does employ humans, though Alibaba declined to specify how many.这里how many后面省略了humans are是吗，how many这里是疑问限定词＋代词吗？

问题 宾语与主语为同一人为什么不用反身代词

可以请问一下吗？He hurriedly hid the ice cream behind him.him 为什么不用 himself 呢？