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问题 since从句的理解与时态难点

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...

问题 时间不明确时如何推测情态动词所表示的时间

...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，还是对现在的推测。请专家指教，谢...

问题 that与what引导从句时的区别（请多举几例）

It is the same old story of not being grateful for what we have until we lose it.怎么把这个句子中的 for 后的引导词用 what 不用 that 给英语水平不高的人讲明白了？顺便再举几个别的例子，怎么翻译? 谢谢！

问题 would+do是对过去习惯的推测还是表示过去习惯做某事

Before his retirement he would catch the early bus every morning.请问老师，上句中的would是对过去习惯的推测吗？一直以为是过去习惯做某事，可是看到有书说这是对过去习惯的推测，不太明白两者有什么不同？谢谢老师的解答。

问题 动词时态选择题(涉及过去完成进行时等)

When I saw the mess my paper was in,it was obvious that someone             it.A.was reading   B.had read   C.had been reading   D.read请老师详细讲解这道题为什么选C项而不选其他项啊？谢谢老师啦

问题 be as long as it is beautiful 是什么意思

The journey my daughter Cathy has had with her swimming is as long as it is beautiful. 请问这里的 as long as it is beautiful 是什么意思？

问题 请问it is 后为什么没表语

We are fortunate that it is , because building new educational systems there and putting enough people through them to improve economic performance would require two or three generations请问老师为什么这里的 it is 没表语？省略了吗？和下句一个道理吗？did后面省略了?&nbs...

问题 far fewer以及find的搭配疑问

... 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后面省略了South Koreans？ 第二，后面...

问题 research down 理解

MALE STUDENT: No wonder featherwork was a symbol of high status in ancient Peruvian societies.FEMALE PROFESSOR: Well, that's definitely a long, dangerous trip to make on foot.I do research down in Peru and I've made that trip, but the easy way-I've flown and driven.MALE STUDENT...

问题 options with hard odds included的理解问题

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...

问题 距离前什么时候加for(什么时候不加for)

一下两句话分别加了for和不加for：The forests stretch for hundreds of miles. 森林曼延数百哩。《汉英大词典》Students often travel hundreds of miles to get here. 学生常常赶数百英里的路来到这里。《柯林斯高阶英汉双解学习词典》for是可...

问题 指代上文it与one的区别

...比如下面这句话：Each misfortune you come across will carry with it the seed of tomorrow's good luck.按我的理解我就觉得这里的it可以换成one，one不也可以代指上文的事物，each misfortune也是泛指，想请教老师我的理解是不是不够准确？

问题 find to one's suprise that..句式怎么理解

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??

问题 not either…or，neither…nor，no …and no… 区别

如：No teacher and no student is admitted Neither I nor he has seen the play before. She isn't either a student or a teacher.

问题 Please give me a chair to sit on.

请问这个句子里的“on”可以去掉吗，不能的话有什么语法规则在里面，可以用汉语里的“兼语”来理解“chair”在这里的作用吗 此外，They have trouble solving the problem being talked about .这里的“about”也和“on”是一样的用法吗