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问题 in addituon to 用法

In addition to being a technological marvel，the Big Mac moonlights as an economical tool.请问老师为什么in addition to不直接加名词，还要加个being呢？

问题 given作前置定语和后置定语的区别

given可以作前置定语和后置定语，对吧？比如：the instructions giventhe given instructions 

问题 only为什么放在句末

The promotional pack will be on sale for a limited period only.这句的 only 为什么放在句末? only 有这样的用法吗?

问题 有关it的用法问题

In a video posted to Facebook featuring,the bear it appear to be in relatively good health and was moving quickly. 请问bear后面为什么还要加it？这样主语不就重复了吗？

问题 标题省略be

Quick to claim credit, the prime minister is nowhere to seen when things go wrong这是《经济学人》的一篇文章副标题。主标题是：As a second wave devastates India, Narendra Modi vanishes标题里的be可以省略，但这里省略be有点怪异。老师们怎么看？感谢！

问题 to be doing 能做宾补吗

填空造句：With his son _____, the dad felt unhappy.

问题 这里的given是什么意思和用法

Please write the details given about each subtopic.这里的given是什么意思和用法？这句话什么意思呀？

问题 that引导什么从句

They teach mental-health professionals how to build enough trust with the mentally ill people person that he will follow advice even if he will not admit to being sick. 请问老师that在这里引导什么从句？

问题 介词短语by boat作主语

By boat is the only way to get here, which is how we arrived.不是说介词短语不能作主语吗？这句是怎么回事？

问题 形容词后置的问题

She had a libel action against the magazine pending.她对该杂志提起的诽谤诉讼尚未判决。请问专家，这个pending作为形容词不是应该形容action的么，那么应该在action之前或者之后都行，为什么会在magazine后边呢？

问题 while, when, as辨析

He was sleeping badly ____ someone knocked on the door.A. while   B. when   C as那么我想问为啥答案是when而不可以是as呢？

问题 关于be done 作谓语

The report urged that all children be taught to swim.这份报告呼吁给所有的儿童教授游泳。请问老师，这里的be taught 为什么不是 were taught?是省略了should 吗？

问题 at 用法疑问

A toll-free number for tourists already in the U.S. or Canada is also available at 1-800-CALL-NYS.译文：而人已经在美国或加拿大的游客则可打免付费电话，号码是1-880-CALL-NYS。此处at是什么意思，是如何使用的？

问题 must表推测

做题时遇到一句话：He must have seen the film last week, ___ ___?让写反义疑问句。我的问题是1 现在完成时为什么和last week这种表过去的时间状语连用呢? 2 这道题答案是didn't he，我觉得应该是haven't he

问题 请教下learn about 的意思

I like the class very much we learn about different plants and animals.   请教下  learn about  表示学习时 和 learn的区别呢 ？