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问题 现在完成时的用法

时间状语副词before.just.in the past.recently常常和完成时态连用，请问这时的完成时态表示“已完成的影响用法”还是“未完成的持续用法”呢？我们可以 将这句话Tom has liked the girl before.和以上副词连用吗？

问题 关于一个否定句的疑问

not to be couvetousis money in your purse请问这个句子是啥结构?not to be 能不能换成don't be？为什么不能用don't be

问题 the only后的名词

For many in China, delivery drivers like Mr zhang are the only connection to the outside world. 请问老师为什么connection是单数呀？不能用connections嘛，谢谢老师。

问题 introduce 的用法疑问

Are there any places in China with rich biodiversity like the Amazon rainforest? What are they? Introduce one to the class.请专家老师分析一下introduce 的用法。我查了一下英英词典，好像没有一条是符合此句用法的。

问题 从句与短语的选择

_____the facts of the case, the solution was obvious; consequently, Holmes sent for the police.A.Upon considering B. When he considered C. In consideration of D. When considering有哪位老师可以帮忙解答一下吗？

问题 early example 怎么翻译

An early example of what would come to be known as the Map of National Humiliation began circulating in the late nineteenth century.这里的early example要怎么翻译？翻译的时候可以省略嘛？

问题 这句话怎么翻译呢

Opera artists began using layers of masks made of oiled paper. They could peel one after another in the blink of an eye.这里的one after another是指layer还是mask呢？

问题 good to eat的用法

老师你好!上面 a lot  of the  time我感觉有些错误？应该用in a lot  of the  time。good to eat好像有语法错误？

问题 疑问句为什么用陈述语序

Which symbol best stands for Chinese culture in your eyes？这里是陈述语序？为什么是疑问句？

问题 “一位朋友的问题”的补充(再再续)

...不带状语是已完成用法，带状语是未完成用法。He has been in Zhengzhou. 他在郑州住过。（现在不在郑州了。）He has been in Zhengzhou for six years. 他已经在郑州住了六年了。（现在还在郑州。）They have been here 他们来过。（现在不在这里...

问题 study为什么用复数(studies)

My two elder brothers help me a lot in my studies.请问这里的 study 为什么用复数？

问题 more than前后省略了哪些

Around thirty-six-million people live there now, more than in any other state.请问这句话more than 前后省略了什么？

问题 关于educate的非谓语动词形式

老师您好，请问：________（educate）in a key university is what many students long for.这里应该填写它的什么形式呢？

问题 are experienced 的形式问题

Positive changes that are experienced in a variety of ways are more likely to lead to lasting happiness. 这里的are experienced 为什么要是被动的形式呢？

问题 among them poverty，用法疑问

The challenges in the region remain very real, among them poverty, war, and the breakdown of political institutions.句子里 them正确吗