找到约 14000 条结果

问题 想问问老师have been doing 和have always done都表示"一直"的意思，但是学生想知道得详细一些。

...了区分动态动词和静态动词而出现的两个表达方式，have been doing 后只能接动态动词，have always done 只能接静态动词？问题2:还是说have been doing 静态动词和动态动词都可以接，只是have always done 一定得接静态动词？      麻烦老...

问题 分析:surprising dead stars和hundreds of millions of

...此会不会多余？是什么意思？2. Scientists think that there has been life on the earth for hundreds of millions of years.请问：这里的 hundreds of millions of 是什么意思？

问题 It has all but 用法

...n a society that spends so much time listening and being talked to that it has all but lost the will and the skill to speak for itself.1)句中...that it has all but...中的it究竟指什么？2)句中...that it has all but...中出现的...all but...如何理解并使用？...all but...中的but...

问题 Everyone has their advantages.此处用their可以吗？

Everyone has their advantages.Everyone has his/her advantages.这两种说法都可以吗？请老师们指点。

问题 这道题选择现在完成时还是现在完成进行时

I ______ a brilliant idea as to how to solve the problem.A.have just hadB.was just havingC.just have beenD.have just been having这道题选择现在完成时还是现在完成进行时？

问题 did so是什么意思

... that the rise in births in 2016 was probably a one-off as couples who had been waiting to have a second child did so as soon as the policy changed.译文：分析人士称，2016年出生人数的上升很可能是一次性的，因为等待生育第二胎的夫妇在政策改变后马上利用了...

问题 have sth done 的问题

...d ________ went wrong agaA. to repair      B. had been repaired     C. had repaired      D. to be repaired老师，这选B，这里是have sth done的结构嘛？ 但是里面的两个had ,还是看不懂？

问题 I haven't been quite ready. 这句话表达方式对吗？

---I'm afraid I ______ quite ready.---Never mind.请问老师这里是否可以用完成时？ I'm afraid I haven't been quite ready. 这种表达方式正确吗？ 我总感觉应该是I'm afraid I am not quite ready. 

问题 为什么用了过去完成时I had not seen him

...street to avoid meeting him, but he saw me and came running towards me. It was no use pretending that I had not seen him, so I waved to him. I never enjoy meeting Nigel Dykes. He never has anything to do. No matter how busy you are, he always insists on coming with you. I had to think of a way of pr...

问题 sth/sb plan sth/sb to do/be... 这种句式是否正确

...ew strategy are planned to be divested or managed for value.This objective was planned to be met by implementing 4 main activities with 5 subsidiary tasks.The Tesla K20 is planned to be available in the fourth quarter of 2012.We serve communities that are not currently served or ‘planned to be ser...

问题 句子结构分析...in trying to find a job or a friend

They run into constant discrimination in trying to find a job or a friend.句子结构分析，特别是红色部分的详细分析。

问题 表示现在时间的虚拟，为什么可以用If had done...would have done这种形式呢

...n his seat.If he had wanted to stand and shout for help, he would not have been able to. His tongue had swelled to twice its size, and when tried to move it, it stuckhorribly to the roof of his mouth. His legs were limp.-John Cheever: The Five-Forty-Eight章振邦新编高级英语语法195-196页...

问题 best-seller or not为什么没有用冠词或复数

Best-seller or not, the book sounds as dull as ditchwater to me. 不管这本书是不是畅销书，反正我读起来枯燥透顶。句子中的best-seller 是可数名词，但它为什么既没有带冠词，也没有用复数？

问题 句中as with是什么意思

The rail system was chosen because the cost of energy is not so great as with a bus system because it is much easier to carry a great number of passengers by train than by bus or car, and because the noise and pollution is not so great as with buses and cars. 句中as with是什么意思？

问题 英语填空题（为什么不填is）

Once, the only way to profit from fashion as a collectable item was to buy rare ,vintage or antique garment in mint conditon-an expensive business and still (  ) which offers relatively risky return. 请问老师此处为什么不能填is？ 可以理解填something 或 one，不能填is ...