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问题 there be句型

Some of the objects up there are working satellites.这句话some…up这部分是什么成分呢？这句话我不太理解结构了。

问题 sign的用法

Rapid breathing and breathlessness can be a sign of lung disease, particularly asthma and bronchitis.请问老师，过快呼吸和上气不接下气后面的sign为什么不用signs?

问题 as的定语从句

The number of staff ______ is needed for quality control can be substantially reduced. 这句话为什么不能填as？

问题 “情态动词+have+done”能否对将来表示推测（一般用来对过去推测）

... state affairs may have been encouraged--though not justified--by the lack of legal penalty for data leakage. 星火英语的翻译是：现在的这种情况,可能会由于缺乏对资料泄露的法律制裁而愈演愈烈,虽然这是不正当的。（将 may have done 翻译成了对将来的...

问题 奇怪：这个祈使句省略的主语不是you

有这样一个句子： Our boss is really a kind-hearted person—always ready to help anyone in need. 我们老板确实是位热心肠的人——总是乐于任何需要帮助的人。 这个句子破折号后面的祈使句的主语好像是our boss吧！这不是破坏了&l...

问题 all用作副词修饰形容词或副词时有限制吗

...？He is all angry.I’m all tired.Tom is all successfulHer father is all interested in it.请老师详细介绍一下，鲜花一束谢谢您！

问题 since做连词引导句子的时态问题

一般since引导的状语从句都是过去式，然后主句是现在完成时或者现在完成进行时如：So much has changed in the sport since I was a teenager.但有看到过是引导的句子是现在完成时的而非过去式Since you're finished the work, you may leave anyime1、...

问题 这两个句子没有被动语态的原因是什么

...bsp;        （1）We asked for Mr Miller to be placed in a more responsible position.（2）（1）没有被动语态，是因为come不及物吗？（2）没有被动语态，是因为to be placed已经是被动的形式了，所以才没有被动语态的，对吗？请老师...

问题 判断 to 是不是介词(可能涉及 from...to)

Rather than being opposed to the entire idea, his apprehension seemed to be from reluctance to send a new weapon to the front in too small numbers.句子中的 send 前的 to 应该是介词吧，而不是不定式，所以 send 应该改成 sending，这样分析对吗？求解答! 谢谢!

问题 before之前什么时候用一般过去时和过去完成时

比如：Her book，“Determined，Dedicated and Disciplined To Be Fit，”came  (come) out in April just before she turned eighty．The bus had left before I arrived.为什么两个不一样呢？什么时候用一般过去时，什么时候用过去完成时。

问题 decide which evidence to believe是什么结构

In a trial ,a judge must decide which eyewitnesses to believe and which not to believe .这个句子是: a judge must decide (that) He is to believe which eyewitnesses.的省略句吗？还是a judge must decide to believe which eyewitnesses.是不定时的复合结构？

问题 过去进行时与过去一般时的区别

...让他们用进行体的？他们和用一般体有什么区别？I read in the library.It rained hard.例句5中的speed词典里说通常用进行体。 例句1.2表示延续事件，例句3.4.5分别表示什么事件呢？

问题 family的用法

各位老师好，有一个关于family的用法想向大家请教：During the Ming and Qing dynasties, the emperors and their __________ (family) worked and lived in the Forbidden City.在这个句子中横线处用family的适当形式填空，答案是families。但我的理解是：在明代和...

问题 英语难句翻译

Adding to a woman's increased dose of stress chemicals,are her increased "opportunities" for stress这个句子如何理解？求解释

问题 with 介词短语

The greatest historical treasure of all is London with its museums, art collections, theatres, parks and buildings.with介词短语在句子里当后置定语修饰伦敦还是状语？