问题 but用于句首的词性和用法

But after trudging for more than six hours through rivers,they reach the first gold mining camp. 这里的but是什么词性？什么用法？

问题 定语和状语区分

请教老师：Announced last month, the show will feature stars who are – gasp – over 30, vying for a spot. 1、announced last month只能作状语吗？分词短语作定语，只能放在修饰语后面吗？2、– gasp –是插入语吗？为什么用一个单词作插入语，是否...

问题 向老师请教被动和主动语态的问题

It was difficult because of the hard resin________the skin. A.covered B.covering 这里为何不用covered，不是可以翻译成“因为树脂被覆盖在皮肤上”吗？ 被动语态。

问题 不定式和现在分词的区分

China is witnessing the internet swarming with Whanghong, the grass-root internet celebrities who win nationwide population by pulling stunts.swarming是否可以改为to swarm？如果不可以，什么时候witness后可以接：名词+不定式？

问题 现在完成时态和过去式的区分

Shepan is famous for its caves, all 1,360 of them, which have earned (earn) it the nickname – "Island of a Thousand Caves."have earned是否可以改为过去式earned？

问题 hold和observe 都没有'纪念'的意思,

牛津高阶朗文当代 Collins 麦克米伦韦氏  observe词条都没有提到'纪念’这句翻译中的'纪念'应该换成什么跟bserve对应 ?要不就是observe换成__ ?再不就是把‘纪念’撤了?

问题 too...to和so...that...

The shoes are too small to wear.The shoes are so small that I can't wear them.为什么too...to中wear后面不需要再加宾语了呢

问题 have time to do sth和have time doing sth的区别

请问 have time to do sth 和 have time doing sth 的区别？

问题 as long as和the moment 区别

 The police set about arresting the suspect _______ they found enough evidence to prove him guilty.A. immediate         B. as long asC. the moment         D. as far as答案为A。请问B. as long as和C. the moment 区别

话题 in winter in

问题 辨析: achieve和attain

After working for the firm for ten years, he finally ____ the rank of deputy director. A.achieved   B.approached    C.attained     D.acquired 答案是C，我选的是A，想请教一下老师两者之间有什么区别。

问题 如何区分defeat表示“取胜”和“失败”

I feel sorry for their defeat by the opponents. 他们被对手打败了，我感到非常难过。We cheered for their defeat of the opponents. 我们为他们打败[战胜]对手而欢呼。 疑问：对这个defeat何时表示取胜何时表示失败不理解。

问题 英语句结构和意思疑难，求解

Or so the thinking has gone since the early 1980s, when juries began holding more companies liable for their customers’ misfortunes.so the thinking has gone since the early 1980s 这句英语怎么理解，语法什么的，不太懂啊。求详细的理解！

问题 如何区分一般将来时和将来完成时

By 2020，scientists surely _________ a cure for AIDS.A.will discoverB.will be discoveringC.must discoverD.will have discovered

问题 用现在分词和过去分词的区分

However, if a business is heavily sales driven, it can make more sense to have a monthly operating plan, supplemented where necessary with weekly targets and reviews.这里为什么用Supplemented，而不用现在分词形式？