...as virtually required for the Big Bang,first put forward in the 1920s,to maintain its reign as the dominant explanation of the cosmos.实际上，巨大的宇宙云的存在，是20世纪20年代首创的“大爆炸论”得以保持其宇宙起源论的主导地位所不可或缺的。请问...
...在时<<剑桥中级英语语法>>定义:We use present simple to say that something happens all the time or repeatedly, or something is true in general.以上3句应该属于something is true （客观事实） 还是 something happens all the time or repeatedly (经常发生的...
在 It was the first time that-结构中，that-从句通常用过去完成时，有时也用一般过去时，有时若有包括现在在内的时间状语，偶尔还可用现在完成时：I was lucky because that was the second time I (had) visited Japan that year. 我很幸运，那是我那年...
Once you have made the first move, there is no turning back.参考相关用法：there is no后面直接加名词，比如there is no water in the bottle.there is not 后面也加名词，但是这个名词前面往往有个修饰词来修饰，比如there is not any water in the bottle.
...inging，我尝试性判断一下，不对还望各位老师不吝指教：He personally welcomed them home singing the unofficial anthem（此句中singing及后面的从句 singing作为 分词 为 状语）There is even a "Viva Obama" video featuring a group of mariachis ...
If his object had been health for health’s sake, the result would still have been well worth any sacrifices of momentary desire that it cost him; but he had a higher purpose.句中any sacrifices of momentary desire ，可以概括N1+of+N2, N1和N2根据具体的情况，可以有多种理解，这...
Oh, yes. Well, towards nightfall I found myself carried out to sea by a strong wind. It was all my fault. I didn’t know whether I could survive until morning. The next morning I’d just about given myself up for lost when I was spotted by a ship.请问：句的 morning 前面为什么没有用冠...
...实条件句。1.(If) simple past/were + (Main) would, etc +inf2.(If) were to+ inf+ (Main) would, etc +inf习题：1. If I ____ (earn) a good salary, I wouldn’t think of changing my job.2. I wouldn’t buy the picture even if I ____ (afford) it.3. If I____ (use) a typewriter, I would save a lot of...
Scott is delighted to get food advice from a physician who is program director of the nearby Diabetes Center,part of theHealth alliance.这句话中的" part of theHealth alliance"是对"Diabetes Center"的补充说明，那么它在句子中是作什么成分呢？我一开始想的是宾补，...
...so diverse it blew me away when I sampled the real thing on my
first visit to China.译文：当我第一次去中国，品尝到地道的中餐时，就被多种多样的口味惊艳到了。曹老师好!1. 原句使用的是so…
that… 结构吗？也就是The
flavours are so diverse that it bl...
...（非延续性动词），fell
asleep.是否改为：I couldn’t begin to
do any other things until my brother fell asleep.或者I couldn’t do any
other things before my brother fell asleep/was asleep.
...d all our seats occupied.
l heard my name called.
b句：I have a letter
to be written.
a句b句都是及物动词做非谓语的被动语态，请问老师为何a句过去分词与宾语是动宾关系而b句不定式与宾语是主谓关系呢？难道就是因为a句是过去分词做宾补而...