问题 mainly用法

Bullying happens where young people spend their time—at present, mainly Instagram, Snapchat, Facebook and WhatsApp.mainly为副词，后面跟的是专有名词。这里是省略了内容么？

问题 appear to have done 和appear to do 的区别

原句：A desire to sell gold appeared to have been worsened by thinking that concerns about the Greek economy have somewhat eased. 此句中可以用appear to be 吗？Appear to have done 和appear to do 有何区别？谢谢老师精彩解答。

问题 the majority of 和 a majority of 是否可以互换

...的一篇语法填空题，里面出现了这个，有一篇答案认为 a 和 the 都可以，一篇只给了 the，所以挺疑惑的，到底是用 the 还是 a ，还是可以互换呢？

问题 怎么区分定语和插入语的区别

...第二句话如果是定语就差关系词了，那么怎么分辨插入语和定语的区别了，为什么又要用主格了，如果没有插入语者后面的woman who可以用whom吗

问题 in government与in the government的区别

有时见到 in government，有时又见到 in the government，它们有区别吗？谢谢！

问题 刘老师，in from 中 in 是作副词吗

For males under forty，ten seconds is the typical reaction time；young men can demonstrate full erection in from 3 to 5 seconds of sexual stimulation.The reaction time is doubled or tripled  for men in their fifties and above.刘老师，这里的 in from 如何去理解 in 这个词？

问题 Known 和 Be known 的疑惑

The old word “milk” came from Sanskrit (梵文), one of the oldest languages (27)________ (know) to man.这个空填konwn, 是作为非限制性定语从句，还是非谓语动词作定语修饰Sanskrit呢？ 这里填被动的形式可以吗？

问题 英语句子理解和翻译（涉及as的用法）

A mother describes her child's hastily-made table as "perfect",even though it couldn't stand on uneven legs.红色部分如何理解，以及这个as该怎么翻译恰当？

问题 定语从句和名次性从句的区分问题

He wrote a lot of novels ,none of _____was translated into a foreign language . A. them C. it B. which D. what 老师，这里选B，但是如果要看成名词性从句，选择D，句子结构要如何调整呢？

问题 不定式和现在分词的比较

Two studies showed just walking for three hours per week for only three months caused so many neurons to grow that it actually increased the size of people’s brains!这里的to grow是否可以替换成growing ？ 表达上会有什么不同吗？

问题 请问除了用法上的差别，many和much的根本区别是什么。

问题 else和 other，others区别

Where _____do you like  to go? A.other  B.others  C.else  D.other places 答案为C选项，我在百度搜了一下，A选项other 后面修饰名词，所以排除，想请教老师B、D选项错在哪儿？谢谢。

问题 做表语的现在分词和做表语的动名词有什么区别

问题 come what may和cost what may

come what may是怎么变的倒装？cost what may又是怎么变的？这两个what有什么区别吗？

问题 同位语和插入语的问题

1.Three years ago, 2015, we have made a great improvements. 2.Three years ago, that is, 2015, we have made a great movements.    这两句话对嘛？我想表达的是：三年前，也就是2005年。谢谢老师指点。