The library ______for more than 60 years since it _____ in 1940.
A. has been open; opened
B. has been opened; opened
C. has opened; was open
D. has been open; was open
正确答案为A。但 D 为何不可以呢？有资料说，当 since 引导的状语从句的谓语动词是延续性...
...在前后用逗号隔开，但下面这个句子用的是破折号：The tall building over there—which cost 300 million yuan to build—has been empty for a long time. 那边的那栋高楼，就是花费了3亿元的那一栋，已经空置很长时间了。请问老师：非限制性定语从...
辅导班的一道关于情态动词用法的题目：
Her birthday was a week ago, so it _______ (can't / be ) on the 25th.
A. can't be B. can't have been
我不太明白25日是说话之后的日子，还是之前，所以不知道应该用对过去的推测...
请问下面这两个句子是否有误？1. He usually ate fast food and no breakfast before.ate 在此处这样用可以吗？用 had 比较好还是用 ate？有没有 eat breakfast？2. What he does makes him like a father or uncle.（http://ask.yygrammar.com/q-7237.html 陈根花老师的...
Of course, not everyone is over stressed. “It’s a convenient shorthand to say we’re all time-starved, but we have to remember that it only applies to , say, half the population.”当然，并非人人感到时间过度紧迫。“说我们都缺少时间只是随意讲讲，我们应该记住...
According to a 2017 survey, 70 percent of South Koreans do not eat dogs, but far fewer—about 40 percent—believe the practice should be banned. It also found 65 percent support raising and slaughtering dogs in more humane conditions. 第一，far fewer这里far是副词修饰fewer后面省...
But, of course, they had no satellite, Internet or weather broadcast to help them.I have a shop selling toys.第二个可以弄懂，是现在分词作定语。第一个句子的 to help 是什么成分，什么用法呢?
Yes, uh… the language point of view, for the foreign people who have a business with Japan to know the fact is good to know that is shortened sentences like the greetings saying “thank you” in Japanese.saying “thank you” in Japanese.这里是做介词like的宾补吗？那么如何区分sa...
He theorizes that it is the emotional component of these intangible prizes that make them effective. In fact, vaguely-stated possibilities of winning a prize were more effective than options with hard odds included.hard odds included翻译为 包括了更难的赔率 吗？不是很能理解这部...
They found to their surprise that the goddness turned out to be a very modern-looking woman.这句子中found to their surprise 结构是什么意思? to their surprise成了found的宾语吗? 这样的话,that从句起什么作用，去修饰surprise??
And they played with them, all while tracking the data each app sent out.The way many Americans view Mexico-as a cheap place to vacation, shop and party, all while ignoring the fact that the poorer locals can't afford to join the merrymaking.请问老师all while和while一样吗?如果把all理解...
With this delivery technique the puncture site would be very small and recovery could be through the entry site or through the groin as the filter could be inserted distal to meet a recovery sheath in the aorta.