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问题 to do做表语

尊敬的老师，有这样一句话: 背景:In the past 6 months he has made 5 trips. There were to Asia and two were to Europe.从背景可以看出这些trips已经做过了，为什么下面是 to Asia,不定式不是表示还未做吗？

问题 怎么理解这句话？

President Trump thus interposed the powers of the Presidency against the lawful subpoenas of the House of Representatives, and assumed functions and judgments necessary to the exercise of the “sole Power of Impeachment” vested by the Constitution in the House of Representatives.

问题 to作为介词做状语

Irresponsible financial regulation in the US has a good claim to being the main cause of the crisis.对于这句话我的翻译是:对于这场危机的主要原因，不负责任的美国财政管理有一个很好的说明。我翻译的一定不对，希望可以得到指点，谢谢！

问题 被动语态的用法

...这样的 The brave man saved a girl out of a fire and the news was spread in the city quickly.这里spread用了被动语态，这是为什么呢？也是表示传播

问题 threaten to的用法

forced displacement of people threaten to reverse much of the development progress made in recent decades.被迫流离失所的人民有可能使近几十年来取得的许多发展进展倒退1. forced displacement of people2. threaten to对这两点不理解。请老师指教。

问题 比较 any， any other 的区别

比如这样一句话：Canada is larger than any country in Asia.any countryany other countryany other countriesother countries想弄懂这几种表述的区别

问题 how引导宾语从句

The researchers from Mayo Clinic in Minnesota asked the volunteers about how mentally active they had been between the ages of 50-65.请问老师，这里是不是可以把句子理解成they had been how mentally active between the ages of 50-65. 是把mentally active提前了？

问题 even if 的句子分析

Even if you travel in ideal weather, sea journeys take a long time.老师，请问可以帮我分析一下这个句子的时态吗，这个句子是新概念三的，我不懂为什么主从句都用一般现在时，谢谢老师！

问题 once放在句首的用法

Once one of the largest and busiest cities in Taiwan, it is now part of Taipei.    此处once后面省略了it is么因为与后面的it is重复所以省略?

问题 关于seat的用法

...去掉，Not far from the school there was a garden who/whom owner seated in it…成立吗？安排某人坐哪，可以直接表达为：seat sb somewhere吗？

问题 为什么用feature而不用featured

That was shot in Paris and features Chinese pianist Lang Lang句子中的feature为什么不是featured形式？

问题 为什么要将but改成yet

求助老师们!The fruits are small in size, but juicy and tasty.此处为什么要将but改成yet?

问题 if that 是什么结构

Moreover, it had to be borne in mind that the hugest whales, those found near the Aleutian, Kulammak, and UmgullichIslands, have never been longer than 180 feet, if that. if that 是什么结构？

问题 There stood…句式省略there的疑问

In the doorway (there) stood a man with a gun.这个句子中的 there 放在括号内，是表示可以省略吗？

问题 see a film与watch a film（看电影）的区

see a film 和 watch a film 都可以表‍‍示“看电影”，它们有区别吗？有些书上说，表示“看电影”习‍‍惯上要用 see a film，但事实上 watch a film 的用法也很多。请专家老师解释一下，谢谢！