问题 虚拟语气中用If it wasn't 和 weren't 有何不同

"If it wasn't for the mist we could see your home across the bay," said Gatsby.虚拟语气中，以上为什么不是If it weren't 呢？ 用If it wasn't 和 weren't 有何不同？如何区分二者的使用？

问题 “过去将来时was going to“含义和用法？

...- was going to 如何理解这里的“过去将来时was going to“含义和用法？如何准确翻译成中文意思呢？

问题 定语从句中现在完成时和过去完成时

•We received on February 7 the xx goods that we have ordered, but …该句定语从句中的时态用现在完成时是否正确？可否改成：•We have received the xx goods that we ordered on February 7. but … 

问题 现在完成时时态和单词词性问题

My computer has been attacked by a virus.1. 这个句子为什么用现在完成时而不用一般过去时呢？它用现在完成时是想说明什么？2. attack在这里是作及物动词，还是不及物动词？怎么判断的？因为它后面也没有接或没接宾语呀?3. yet, already, g...

问题 关于这句话的代词和介词的问题

The heap is the runtime data area from which memory for all class instances and array is allocated.这里的which指代什么，还是说只是直译成哪个？from应该怎么理解，在这句话里。为什么最后class instances and array不是用are而是用is?

问题 此处pull，but和publicity stunts如何理解

Dennis Rodman, the muscular, tattooed, and much ballyhooed player formerly of the Chicago Bulls, makes headlines whenever he pulls another of his crazy but fun-loving publicity stunts.

问题 关于定语从句中why和for which的互换

I finally understood the reason why my mum had encouraged me not to give up.这个句子里的why是引导定语从句吗？可以换成for which 吗？

问题 remind 的用法和理解

偶然在网络上看到remind这样的使用方法：I'm just reminding you that Chinese New Year is coming up.这里的remind用进行体是什么用法呢，remind本身的动词体是什么？我个人理解是进行体的委婉用法，remind本身是静态动词。在英语常用词疑难用...

问题 have sb do 和have sb doing

 I'm sorry to have you ______( take) the blame for my mistake. 这句话 用take 可以吗？ 为什么参考答案只能是 taking啊?

问题 解释succeed in doing sth中的in的用法

It is exciting that we have succeeded in sending up Shenzhou V. 我们成功地发射了神舟五号这件事情真令人兴奋。请解释一下句中in在这里的用法，它可以换用其他都介词么？比如on？谢谢老师！

问题 关于not until的倒装，以及not until的IT引导的强调句中位置变化的问题

...til late in the morning  her husband arrive home.这种句式中，not和until一定要靠在一起吗？2.not until用在it引导的强调句中。例句：It was not until I saw Mary that I felt happy. =I did not feel happy until I saw Mary. 直到见到...

问题 in the last 10 years与in the past 10 years有区别吗

如题，下面这类短语有区别吗？in the last five years 与 in the past five yearsin the last 10 years 与 in the past 10 yearsin the last 150 years 与 in the past 150 years

问题 从句句尾是介词，be动词，助动词，如何巧妙的理解结构和使用方法呢

从句句尾是介词，be动词， 助动词， 如何巧妙的理解结构和使用方法呢？例子(1) Obama is taller than me (is). This is the road we came by.

问题 in common 是作状语还是作定语（have sth in common）

They have only one thing in common.in common 是作状语？还是作定语？

话题 the state capital in Lansing中的in