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问题 be used 和 have been used的区别

Six million hand driven rivets and 53,000 tonnes of steel were used in its construction. 这里面填的were  used 和 have been used 有什么区别呢？ 一个是强调过去的事实 ，一个是和现在还有关注，或者对现在还有影响？ 求指点！

问题 It seemed as if the world was at an end是虚拟语气吗

At 3:42 am everything began to shake. It seemed as if the world was at an end! 新人教版课本必修一 Unit 4 Reading 部分的这个句子。应该是用虚拟语气吧？

文章 高中英语新教材-词汇教学参考资料-译林版-必修2-Unit 3

...ear               ▲sleeve*▲说明：以上收录了阅读文章和语篇练习中所包含的生词和短语，未收录指示语和讲解文字中所包含的生词和短语。带*的词条为《普通高中英语课程标注（2017年版）》规定之外的词语。

问题 为什么是must it be, can it be, can he have 这样的语序 ?

... purpose can he have  这3个结构中的what都是what的哪种用法和含义呢？ 3个用法都是一样的吗？3）And what deep and earnest purpose can he have which calls for such a trial： which的先行词是不是整个“And what deep and earnest purpose” 呢？4）I have done al...

问题 主语从句that和how

It's unknown to us______the air crash occurred in the mountainous area yesterday.A. that    B. how答案选择A。 请问为什么不是B，我们不知道昨天在山区的空难是如何发生的？然后由how引导的从句做真正主语。

问题 现在分词作伴随状语和过去分词作伴随状语，究竟有哪些本质的区别？

关于现在分词作伴随状语和过去分词作伴随状语，究竟有哪些本质的区别，一直没有完全搞清，以下面几句为例，请教老师详细深入分析：1) The students entered the classroom, following their teacher.  学生们跟着老师进入教室。动作是...

问题 work at home还是work from home

有这样一个句子：Rather than going into an office, a lot of people are connected to the Internet and now work from home. 现在有许多人都不去办公室，而是连接到互联网，在家里工作。请问这里为什么用 work from home，而不用 work at home 呢？

问题 怎么理解 work from home(与 work at home 有区别吗)

我了解它和 work at home 的区别，但仍无法理解 work from someplace。我的思维只能停留 work 意为工作，from标志起点。

问题 cracked with的用法

His mind had already cracked with thirst.1. 教材上说的是cracked with表示因....而疯狂，是不是根据时态的需要，可以不用crack的过去时态。2. with, at, for, over 介词都可以表示心里精神方面的原因，老师可以分析下各有什么侧重点和区别吗？

问题 and one look at him如何进行语法分析

A mischievous grin spread over his bronzed face, and one look at him, without those glasses, showed that the uniform was a disguise, that this was no sedentary bureaucrat but an out-of-doors man of action.

问题 done和having been done的区别

请教专家 They sat in the room with the curtains drawn. 这里的 drawn 可以是 having been drwan 吗？为什么？

问题 as much 何意？ 是否应该改成so much 呢？

VOA 《US Approves Emergency Use of Vaccine》In the case of health care workers you can find them in health care settings, so and in the case of long-term care residents that certainly they're in long-term care facilities,so it may not mean as much for the first two priority groups., but once you s...

问题 now的时态

1."I think the rule _______(work) well in our school now," the headmaster said.老师，填works和is working都可以吗？2.Both of them _______(work) for SkyWest, an airline in America now.老师，填work和are working都可以吗？谢谢！

问题 in their context 如何理解

Watching out for the words and expressions you are trying to learn in your general reading of English. If you come across any of them in use, write them down in their context in your diary or notebook最后一句话是什么意思,写下他们在他们的上下文中在你的日记和笔记本中？

问题 date back to可用于被动语态吗

All the subjects are from the same excavation site in Sanxingdui and can be dated back to between 3000 and 5000 years ago.     该句源自人教版高中英语选修八unit5的教材。一般来说date back to 是无被动语态的，它在非谓语中通常也都...