...为现在进行时还是一般时？例如，原句：If traveling north,you must change at Leeds. 还原：If you are traveling north, you must change at Leeds. If you travel north, you must change at Leeds.
...是动名词作真正的主语。比如：
It’s hard to finish the work in such a shgort time.
= It’s hard finishing the work in such a short time.
我想知道，除 hard 还有哪些词语可以这样用，即前面用 it 作形式主语，后面可用不定式或动名词...
_______，if I had arrived yesterday without letting you know beforehand.A．Would you be surprisedB．Were you surprisedC．Had you been surprisedD．Would you have been surprised这个题目还是困扰着我，与过去事实相反的假设，那么主句的那个事情不是应该在已经发生...
...th the light burning. 灯还亮着他很快就睡着了。All afternoon he worked with
the door locked. 整个下午他锁着门工作。请问可以像下面这样加上 being
吗？He sat under the
tree with his eyes being closed. 他闭着眼睛坐在树下。She was reading,
with the television ...
A: May I ask why you need the time off?B: May friend is getting married and I'm going to be the best man.老师：您好！请问 B 句中为啥要用 is getting married 呢？而不是用一般将来时呢？谢谢。
... following would NOT be offered
by this walking?
A. Visiting the seashore and farmland.
B. Exploring famous trails in the history.
C. Barbecuing while picnicking in the forest.
D. Having a swim while resting.
请问老师：
Barbecuing while picnicking in the forest.和Having a swim
while rest...
...（短暂动词，瞬间动词）？还有visit, 词典的解释是to go and spend
time in a place of with someone, especially for pleasure or interest, 这个动作我也没看出短在哪里。还有人说用stop加要判断的动词，这个方法似乎也不是特别靠谱。所以希望能有...