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问题 It is...since...的主句与从句时态

It was three years since Jack had been a teacher.It is three years since Jack was a teacher.请问这两句有什么区别吗？分别是什么意思？第二句为什么不用has been呢？

问题 This is the first time that从句时态

我们都知道This is the first time that从句时态常用现在完成时，请问还可以用别的时态吗，比如一般现在时？

问题 过去分词短语immaculately painted and pencilled作什么成分

Heilbron was clever, and pretty too, immaculately painted and pencilled. It helped. She could argue for equal pay without ruffling feathers. 请问：(1) immaculately painted and pencilled 在句中作什么成分？(2) it 指代的是什么？

问题 被动语态转换（涉及不定式被动态做宾补的句子）

We wished for her to be given an appropriate job.在一个句子中，含有不定式被动态做宾语补语的时候，该怎样把句子转换成被动语态？例如上句怎样转换成主语是She的被动语态？谢谢老师回答。

问题 as是不是随引导伴随状语

...ut his most boring tie for work, and Mrs. Dursley gossiped away happily as she wrestled a screaming Dudley into his high chair前半句，as是不是随引导伴随状语，完整形式应该是Mr. Dursley hummed， when he picked out his most boring tie for work。这是一句话，那么后半句...

问题 请问what a challenge that is!在句子中是宾语从句吗

we all know what a challenge that is!请问这个是省略了that 的宾语从句吗，what a challenge that is作为感叹句还是what引导的宾语从句，what作为定语修饰 a challenge谢谢各位老师

问题 the key to success is to be ready at beginning.

The key to success is to be ready at beginning.老师，这里为什么用to be ready不能写成 the key to success is ready at beginning吗？

问题 effect是什么词性（为什么会出现have和is两个谓语动词）

Since laughter dose effect the body,mind and spirit the only thing you have to do to lead a happy life is laugh.这里的effect是什么词性？后面的一句话为什么会出现have和is两个谓语动词?

问题 Given is/are 用在句首是什么意思

Given is/are 用在句首是什么意思？例句：Given also are the time periods, which set the long-term problem in years.

问题 all 的用法(that is all that matters)

As long as you are happy, that is all that matters.请问这个句子中all的用法是怎么回事? 谢谢!!

问题 让步状语从句倒装后用不用冠词

...he was, he was unhappy. 他虽是国王，但他并不幸福。Child as he is, he knows to help other. 他虽然是个孩子，但知道帮助别人。Teacher as Michael is, he is not capable of teaching all subjects. 迈克虽是老师，但他也不能教所有的科目。我的疑问：如果名...

问题 Momma says stupid is as stupid does.的翻译与理解

Momma says stupid is as stupid does.这是高中英语新教材译林版必修2第1单元的句子(p12)。有人将 Stupid is as stupid does 翻译成“傻人有傻福”，也有人将它翻译成“做傻事的人才傻”，到底哪个是对的啊？求教各位专家老师！

问题 This is after...用法疑问

This was after the eu granted the government a short extension to the date on which Britain will leave, which could be April 12th if the withdrawl agreement struck between May and the eu does not pass Parliament.老师好，this is..是表语从句吗？我怎么觉得after缺主句呢？

问题 有sth is needed to doing的用法吗？

一篇文章里看到的句子：The no. is needed to tacking the shipping orders.另外，tack在这里是什么含义呢？

问题 it is not easy being your age分析

为什么 it is not easy being your age用being 而不是加to？