问题 主句前加then

现在分词作状语，主句前可以加then吗？Using high technology, then we can do it much better.句中then的意思是那么。

话题 since是否能与become连用

问题 since后面用过去式和完成式有什么不同

It has been two years since I was in this university.为什么这句话不是翻译为“我上大学已经有两年了”？如果要表达“我上大学已经有两年了”，是不是应该说：It has been two years since I have been in this university.

问题 过去分词做状语的用法

... two other important factors in measuring a company’s success – social performance and environmental performance. Put in a more friendly way 3BL is about ‘People, Planet and Profits.’ Nor are these things unconnected: the three legs are in fact strongly linked.曹老师，你好！Put in a m...

问题 单复数的使用问题

Today it is common for corporations to direct their attention to serving shareholder and management interests and to achieving the highest or short-term financial return.请问老师，这个句子中，shareholder 不是可数名词吗，可以不用加复数的吗？

问题 as介词短语分析

...development funds—including government, higher education, non-profit and corporate—varied from around 4% to 25%; in most European nations, it is about 15%.请问老师as介词短语如何理解？作为所有研发资金的比例的国家支出从4%到25%不等？感觉好别扭啊。

问题 since引导时间状语从句时主句可以不用完成时态吗

有个问题一直让我困惑，那就是：since引导时间状语从句时主句可以不用完成时态吗？

问题 非谓语问题

...兴舞种，然后结合了A舞和芭蕾舞），给的选项也是to de performed, performed, performing, 还有个我忘了。一到考试脑子平时想的主动被动，进行完成，将来现在，就有些拿不准了，想拜托老师指点一下。有时候感觉考试答题和平常做有...

问题 then后面的倒装

then到底作为副词是用完全倒装还是部分倒装？我在英语语法网上几篇里面看到的都是有here,there,then等开头的副词用完全倒装，但又在一篇文章中看到：always, usually, often, now and then, many a time, every day等频度副词位于句首，且表...

问题 新概念英语第二册82课我有两处疑问

...ver skin, and a bright red tail. The fish, which has since been sent to a museum where it is being examined by a scientist, is called an oarfish. Such creatures have rarely been seen alive by man as they live at a ...

问题 表示时间的since与after区别

He has been back twice ________ moving to China.我也认为最佳答案是用 since。可是怎么说服被人不用 after 呢？最好能用时间轴的图解来区分它俩表示不同的时间概念，非常感谢专家老师的帮助。

问题 since主句的现在完成时可以用has had to吗

He has to move about in a wheel-chair since five years old. 按语法规定，这个句子不太对，因为 since 前面的句子应该用现在完成时，但这个句子的谓语是 has to，它如何变为现在完成呢？难道是用 has had to? 像下面这样用？ He has had to move ...

问题 amount与number的区别

...s, two-thirds of the total (  ) of wages and salaries paid by all the corporations in the United States.A. figure  B. quantity  C. number  D. amount 正确答案为D，但是amount通常与不可数名词连用，这里wages and salaries是复数形式，为什么不选择C...

问题 终止性动词leave可以连用since状语吗

Mr. Wang  has left for Australia since 50 years ago.答案给的是has left，但我认为leave是个短暂性动词，不应该改成has been away吗？请老师赐教。

文章 no matter 能否直接后跟名词（没有wh-词）

...matter…的省略问题。如下：I wonder if parents should always tell the truth no matter the consequences.这个句子的no matter the consequences从句没有动词吧，是省略了吗？如果是，有什么规律吗？另外，no matter后面为什么没有wh-词呢？也省略了吗？原...