can和be able to表能力，He can watch TV now. He can watch TV tomorrow.前一句可以用be able to的现在一般时替换，后一句可以用现在将来一般时替换. 这个很好理解. 那么问题来了，must和be sure to表必定的推测时，He mu...
...什么问题？
现在分词作状语时与动名词复合结构的区别a. So many directors being absent, the board meeting had to be put
off.
由于很多董事缺席，董事会只好延期。
b. So many directors being absent caused the board meeting to be
put off.
很多董事缺席导致...
There is but one danger which can threaten us. It is that he should strike before we are ready to do so.Another day - two at the most - and I have my case complete, but until then guard your charge as closely as ever a fond mother watched her ailing child. 1) It is that he should...这是强调...
He left the bathroom unwashed.书上说可以理解成如下2种：1）He left the bathroom without washing himself.2) He left the bathroom to be unwashed.请教老师：a）He left the bathroom unwashed. 可否这样理解：把the bathroom unwashed看成一个整体, unwashed是the bathroom...
...动词（原形），表示惊奇，怀疑，不满等。I never thought that he should be such a brave young soldier. 我们从来没想到他是个如此勇敢的小战士。我想问的是：这种情况下必须要跟虚拟语气吗（指should+动词原型）？ 还是说也可以不用虚拟...
1)When
you exercise, your brain releases a chemical, which may make you feel happier. It's just the reason why exercise is cool !2)The reason that people don't go to them
is because they don't trust them. 3)And
that is the reason that we so
closely monitor the global oil markets.请教专家老...
We began swimming towards the voice, but as we were swimming, I lost all the strength I had left, and soon was underwater when I felt a strong arm again carry me to the surface.上面句子中的定语从句 I had left 其中的left是谓语动词还是过去分词作宾补。我觉得是谓语动...
...章和做题时遇到了类似下面的例句：1. if I were you, I would have done something.2.If she could sew, she would have made a shirt我的问题是：1.从句为什么可以使用与现在事实相反呢，我觉得从句与过去事实相反更容易理解一些，即if I had been you
和 ...
1. If , like most
writers these days , you are holding down a job to pay the bills , it is not
easy to find the time to write.问题1：请教曹老师，这个like在条件状语从句中作比较状语吗?2. They are
absolutely altering the food chain beyond what I think even they understand
what ...
网址：过去分词done与现在分词的被动完成式having been done有何区别 - 柯帕斯英语网 (cpsenglish.com)我的疑问1：Built on the mountain top, the house looks like a palace.为什么本句就不能用having been built？用having been built可以强调被动动作built本身...
...主句用进行体时，从句用一般体是为什么？①when he tells of the tall tales, he's not telling tall tales.②By telling others we are busy，we are implicitly suggesting that we are sought after.第二句by doing，是可以看做when从句的吧，当我们告诉别人我们很忙时...