问题 时态判断

The policy—made, the next problem was how to carry it out.为什么用having been 而不是过去的过去had been

问题 时态呼应——“主过从过”

It is the most amazing film I've ever seenIt was the most amazing film I've ever seen1. 这两个句子中用is和 was 有什么区别？2. 时态不是应该符合“主过从过”嘛？如果主句是was，那么从句为什么不是had done？求助大神解答！

问题 情态动词的时态问题

James _______ get a copy of that book before they closed the shop. A.could B.must C.might D.was able to我感觉ABCD都可以啊，时态和语意都通。答案是D。能逐个解释一下为什么行或不行么？

问题 时态问题

我曾在书上看到这样一个句子：The incident takes place in the 1930s. 请问为什么没有使用过去式？是不是错误，应该将takes改为took?

话题 "我懂了"中get时态问题

话题 see表见证的时态问题

话题 从句与主句的时态不一致

话题 不定式的时态和语态

问题 know可用于现在进行时态吗

老师说know是表示心理状态的动词，不能用于进行时态，但是下面这句不是了现在进行吗？这是为什么？Part of good customer relations is knowing how to deal with complaints.

问题 hope用于进行时态的疑问

The institute's researchers are hoping to diversify the genetic code of cheetahs.怎样理解这句话谓语 are hoping 的时态？是正在进行的动作还是将来的后，还是一般性的动作？

问题 ​as of... 作时间状语时句子用什么时态

as of... 作时间状语时，句子用什么时态?

问题 suppose 后接从句时的时态问题

suppose 后接从句时的时态问题Suppose you ______ (take) your complaints to the manager.

问题 条件状语从句的时态问题

请问条件句的主从句通常可以用什么样的时态呢？比如这一句话：If you had to explain the most simple of procedures, you might feel frustrated. 这句话是条件句吗？ 为什么用了过去式呢？可以用现在时吗？

问题 from that time on 连用接什么时态

您好，请问from that time on 后面接什么时态？

问题 现在完成时用于表重复事件的理解困惑

...ional Women's Day) to March 8, and it has been celebrated on that day ever since.The day was only recognized by the United Nations in 1975. It has created a theme each year for the celebration ever since.请教老师：上面2句it has been celebrated on that day ever since. 和 It has created a the...