问题 分析：There was a boom, boom, booming in his ears.

There was a boom, boom, booming in his ears.booming 在这里是非谓语吗？

问题 介词短语作什么成分（Would you like it in a bag?)

Would you like it in a bag?  请问这个介词短语作什么成分?

文章 短语 for certain 和 for sure的用法比较

...氏高阶英汉双解词典》p.2113) （3）We do not know for certain that he will come . 我们不确切知道他是否会来。（摘自[英]弗雷德里克.托.伍德著《英语介词习语词典》p.54） （4）I can’t say for certain when we’ll arrive.  我说不准我们什么时...

问题 as an accompaniment of the great advances in pure science是在句中做it主语的补语吗？

It seems first to have taken possession of a few minds in the seventeenth and eighteenth centuries as an accompaniment of the great advances in pure science.as an accompaniment of the great advances in pure science是在句中做it主语的补语吗？

问题 at night, by night, in the night的区别是什么

at night, by night, in the night 这三个短语意思比较相近，一直没弄清它们的区别，请专家老师帮忙讲解一下，非常感谢！

问题 I have been in Beijing for four years的理解

I have been in Beijing for four years.老师，这句话是指“我在北京呆了四年（现在仍然在北京生活）”，是吗？谢谢。

问题 join 和 join in 用于参加活动时的区别

用 joined, joined in 填空：Soon some of the teachers ______ the singing.Some of us decided to _____ the strike.Everyone there ______ the conversation. 除写出答案，也请老师分析一下原因。 

问题 分析: Win a car in our grand prize draw.

请问这里Win a car in our grand prize draw ! 抽中我们大奖的，得一辆汽车!    draw和our grand prize是什么关系？另外，名词可以做后置定语么？

问题 in the period before的before用法

这里的before是介词，还是能引导时间状语从句？

话题 the first Indian born woman in space

话题 In partnership with the University of California

话题 users in the hundreds of millions怎样理解

话题 in such a way在句中做什么成分？

问题 in/out of/from the darkness 含义辨析?

The cat's eyes were jewels, gleaming out of the darkness.上句用了“out of”, 是什么意思呢？为什么不是in the darkness ?另外，请教老师out of 和 from 有何区别？例如：gleaming out of the darkness 和 gleaming from the darkness ?

问题 Add sth to sth 和 add sth in sth 的区别

为什么用 Add some milk to coffee，而不能是 Add some milk in coffee