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问题 as if引导的虚拟语气

The usually sleepy atmosphere disappears and all the people feel as if they are at a big party.这个句子中as if 后面的are 为什么不改成were呢？

问题 成分分析及句意理解

My father's office was right across the square from where we were standing.1.如何正确理解across the square from的成分修饰关系？2.如何理解“我们”和“广场”的位置关系，是我们站在广场边缘附近还是广场范围之中？

问题 关于动作先后的时态选择问题

...间点之前，所以动作A应用过去完成时。如：Before daybreak they had already wiped out all the enemy troops.在该例句中：过去时间由时间状语“before daybreak”表示出来，“wipe out all the enemy troops”这一动作发生在“daybreak”这一过去的时间点之...

问题 “事故发生一小时以后”如何翻译

事故发生一小时以后，我开始镇静下来。An hour after the accident, I was starting to feel calmer.After an hour of the accident, I was starting to feel calmer.上面哪句对，哪句错，还是两句都对?

问题 due to做状语

due to是形容词短语， Their delay was due to the bad weather 但是如今也会看到当做状语用的 They delayed due to the bad weather。 还有单独用的， 这应作何解，它是不是一种非限定定语从句的省略，先行词是整个句子？

问题 介词短语的理解与翻译

The fuel tank further defines a third vapor space at the vent valve. 燃料箱还在通气阀处限定第三蒸气空间。这样翻译对吗？还是：燃料箱还限定通气阀处的第三蒸汽空间。对句尾的介词短语甚是迷糊请老师明示。

问题 专有名词的后置定语

Cholera is coming back，warns the WHO，a powerful medical and environmental organization under the UN dedicated to maintaining world healthy. 请问，这里的UN与dedicated之间是不是应该加个逗号呢？ 我在语法书里看到专有名词后面是需要用逗号隔开的。

问题 themselves 和by themselves 有什么区别？

比如 They carry on the work themselves 和 They carry on the work by themselves 有什么区别，哪种写法更好些？

问题 that定从的先行词

Teachers need to be aware of the emotional, intellectual, and physical changes that young adults experience. that定从的先行词是changes还是emotional, intellectual, and physical changes还是the emotional, intellectual, and physical changes

问题 现在分词短语作伴随状语还是目的状语

我在网上看到这样一个句子：The explorers traveled the world looking for treasure.对于其中的looking for treasure，有人说是是伴随状语，也有人说是目的状语。哪种说法正确？

问题 关于No和don't

No parking here. 相当于 Don't park here.这里边parking是动名词吗？别在街上玩：Don't play on the street.是否可以表达成：No playing on the street.

问题 宾语从句为动态动词表示事件时，从句时态和主句时态同时是一般过去时时是否正确

...新概念英语2-33课，其中第一句话，Nearly a week passed before the girl was able to explain what had happened to her.如果宾语从句时态写成过去时是不是错句。Nearly a week passed before the girl was able to explain what happened to her.我看了语法书举例子，宾语...

问题 及物动词也可以和介词搭配吗

She felt very concerned for his safety.Her work is concerned with the preparation of the document.请问老师，concern应该是及物动词，怎么这里的两个例句还与介词搭配呢？谢谢老师的回答。

问题 直接宾语与间接宾语的疑问

请专家老师看看我对直接宾语与间接宾语的理解对不对：1. He likes English. (English 是直接宾语)2. He likes the girl. (the girl 是间接宾语)3. He gave me a pen. （me 是间接宾语, a pen 是直接宾语）

问题 except when用法解析

之前的帖子没有得到想要的回答,故再次提问一下：I think most people feel the same way—except when there are social consequences to not having particular items.这里的except when 是介词后面引导了一个宾语从句么？另外the same way是否是做状语？