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问题 once when如何理解

Once when I was six years old I saw a magnificent picture in a book, called True Stories from   Nature, about the primeval forest.  曹老师，您好！请问怎么理解句子中的Once when，我理解when引导从句，和在一起不明白怎么翻译了，谢谢！

问题 at just 80 centimeters wide怎么解释

It's about 2 metres wide.这种表述很常见，但是图片里的这种用法要怎么解释呢？

问题 of how 构成什么从句

So I was thinking about all sorts of mechanical ways of how we can live more in tune with the environment rather than to exploit it?请问老师这里的of how 构成的是什么从句?

问题 wellness与health的区别

A high school class has a wellness book in which they exchange ideas about health and fitness. 句子来自2019版人教版高中英语新教材必修一的 Unit 3（p42）。 请问句中的 wellness 与 health 有何区别？

问题 fell flat是动词短语吗

He immediately fell flat on his back.句子如何译？on his back 作状语修饰动词短语？

问题 句子成分的问题

I heard she was pronounced dead on arrival at the hospital.请问下,dead在这里是主补还是宾补? on arrival理解为时间状语,at the hospital理解为地点状语,这样对吗?

问题 句子改错问题

题：We all face quantity of stresses ,whether at work ,in the home ,or anywhere in between.疑问：quantity of 和quantities of 都可以接不可数和复数可数名词啊！那为什么非要改成quantities?

问题 句子分析与理解

There is nothing which has yet been contrived by man, by which so much happiness is produced, as by a good tavern or inn. 请问这句话怎么理解？

问题 whether的虚拟语气

All people, be they young or old, are required to be citizens of high ideals.请问老师，这里为什么会用虚拟？不论年轻还是年老。

问题 请问这个句子如何断句

You are emphasizing that you like it a lot or think that it is very good这里的断句不是很明白有老师可以讲一下吗？

问题 过去进行时态都翻译成“过去正在进行”吗

John was telling me about it this morning.请问老师，这个句子的红色部分是翻译成“正在告诉”吗？不是的话，应该怎样翻译。谢谢回答。

问题 ​Make sure是短语动词吗

Make sure (that) no one finds out about this.老师，Make sure是短语动词还是固定搭配吗？make sure (of sth/that…)；Make sure of you，Make sure of 是固定搭配？

问题 状语的用法

... a family of five daughters, in favour of a man whom nobody cared anything about.她一直骂骂咧咧，说我们这财产要便宜了一个不知道从哪冒出来的这么个人，实在太残酷了。曹老师您好，请问逗号后面in favour of…是非限制性状语或者补充语吗？

问题 关于have heard的时态问题

— I've heard Bob _____ back from his journey to Africa.— What about visiting him now?答案是has come。为什么不是had come，难道不是过去的过去吗？

问题 构词法

 Children need to be educated on the dangers of drug-taking. 问题1：构词法是规定先宾语后动词吗？drug-taking是否可以改为taking-drug?问题2：句子是否可以改为： Children need to be educated on the dangers of taking drug.