问题 一般过去时与完成时

...理一下。～ Do you know Russian？～Yes, I ________ it for two years when I lived in Harbin.A learned  B  had been learning  C was learning  D have learned答案是A 我想问为什么要用过去时，可不可以用过去完成？另外，现在完成时但凡与过去时作比较时，...

问题 如何理解 now 用于过去时态中

now 的意思是“现在”，但它有时用在过去时态中，这不太好理解，求教专家老师指点！谢谢您！

问题 where 从句的省略现象

Now a visit to Cherry Trees Farm is not the usual sort of visit because where practical  i ask you to help me.请问这里的where practical 是省略了什么吗？这是什么用法，谢谢！

问题 Until then还是Until now

...莫西的差使是散布他的文化腐蚀。译文：Until then did they know that Timothy's errand was spreading his cultural erosion.问题：原文为“直到现在”，译文却用then：那时，是不是应该换成now？换成now后说是现在的事情，是不是？应把助动词did 也...

问题 引导定语从句的where是否要更改为when或that的疑惑？

... in 1984 where Ronald Reagan diffused...where是否误用，是否要改为when或that?4） make age an issue of this campaign. 这里是宾补，而不是make的另一种双宾结构吧？

文章 英语基础语法快速入门——名词性从句

...hether；三是那些可以用作疑问词的词语，如what, who, which, when, where, how, why等。如：That we shall be late is certain. 我们要晚了，这是确定无疑的。What he says is not important. 他说的话并不重要。How this happened is not clear to anyone. 这件事怎样...

问题 time and time again & then as now

...ccess stimulates the desire to better oneself time and time again, then as now.1）time and time again，这里again为副词，time在这里的词性是什么？这个短语中词的词性和语法如何理解？2）then as now，then在这里为副词吗？as now之间是不是省略了成分？...

问题 I see it all now 的用法

I couldn't understand why he was so interested to know all about you; but I see it all now.i see it all now 的 all 在这是副词还是形容词（修饰it）？

问题 such…as引导定语从句

He is not such a fool as he looks.这句话结尾是不是少了like？Such men as he (is) are rare now.这句话中为什么可以省略is？

问题 now that在此句中是既然的意思吗

 Now that I have children of my own, thinking back on my own childhood Christmases has new meaning.请问老师，now that在此句中是"既然"的意思吗？

话题 up to now

话题 now-famous

问题 前置状语

...吗？还有一个问题，如果两个时间状语放一起In February, when he went back, we got the answer we want.请问In February和when he went back是并列关系还是In February修饰后面when he went back, we get the answer we want.这个全句？一共是三个问题，谢谢老师!

文章 if 和 whether 表示“是否”的用法比较

...1）引导主语从句并且与形式主语 it 连用时。例如：It is not clear to me whether / if she likes the present. 我还不清楚她是否喜欢这个礼物。（2）引导的宾语从句放在主句后面时。例如：Did you ask whether [= if] they were going? 你问过他们是否要...

问题 now and then 可以翻译成“度假”吗

请问 now and then 做单元标题， 教材书上怎么翻译成 “度假”？