朗文字典heed词条下有一句例句：
If she had only heeded my warnings, none of this would have happened. 要是她当初听从我的警告，这一切都不会发生。
请问这里的 if she had only和if only的虚拟有关系吗？还是只是一句简单的 if 虚拟？如果和 if on...
A. had done + since: since前面的句子可以采用过去完成时态had done：Since the party she had only spoken to him once.（那次派对之后，她只和他说过一次话。）B. was + since + had done:since后边的从句也可以用...
It's a theory to which many economists subscribe, but in practice it often leaves railroads in the position of determining which companies will flourish and which will fail.若将companies改为单数，意思会有很大的变化吗？
For example, an estimate would be appropriate if you're having a casual birthday party and want to know roughly how many bags of chips you should buy.请问老师：1 if条件句是使用了虚拟语气吗？不懂主句和if从句所使用的时态是如何选择的？根据什么来决定呢？2 i...
...ntle and
kindly his eyes shone behind his spectacles! What a broad brow he
had! To be able to judge perspective at a glance -- and to live on stale bread!
But genius often has to struggle before it is recognized.（出自欧亨利《女巫的面包》）请问老师这一段落中的 gentle and kin...
... curious thing was that the lake was not
marked on the map. I felt as if I
had stumbled into a nightmare country,
as you sometimes do in dreams. And, as
in a nightmare, there was nobody in sight to help me. Fortunately for me,
as I was wondering what to do next, there appeared on the horizon a man o...
In
the 19th century, only one home out of six had a bathroom. A child took only
one bath a week. On Saturday nights childrenall
lined up for their turns to wash in a wooden tub in the kitchen.Mothers
had to boil the water on the fire and carry it over to fill the tub. No wonder children could not ju...
...ll satify the needs of the quick pace of our life.The man insisted that he had done nothing and (he) should not be sent to prison.我认为上述三个句子都是正确的。类似于 I am and will be the the only King.但是我在网上看到过下面的说法：用and 连接的两个句子，时...
This picture often brings back to me many happy memories of your high school days.back是副词，bring back to的用法是否同：bring sb sth或者bring sth to sb？如果用法相同，那么bring back后面应该是间接宾语？或者将间接宾语放在介词to后面？即为：Thi...
Many people now misunderstand emotional inte lligence as almost
everything desirable in a person's makeup hat cannot be measured by an IQ test，such as character， motivation，confidence， mental stability，optimism and “people skills”请问这个句子的结构怎么划分呀？as在这里...
A recent study of ancient clay deposits has provided new evidence supporting the theory that global
forest fires ignited by a meteorite impact contributed to the extinction of the
dinosaurs andmany other creatures some 65 million years ago.为什么不能用to support，用supporting我能理解，...
...send a thank you, she'd give you another gift the next chance she had. 其中让我想不懂的是the next chance she had这部分是什么结构呢？一开始觉得是一个定从修饰the next chance，而the next chance本身充当状语，但没有找到相类似的结构，...