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问题 when引导的从句的省略

The brain is as active during REM (rapid eye movement) sleep - when most vivid dreams occur - as it is when fully awake.请问awake在这里是形容词还是副词呢，在这里是属于when从句的还是as从句的？如果awake是属于when从句的，那么as it is后面不缺成分吗？

问题 get off(下车)off是副词还是介词

代词是放在 get off 中间还是后面呢？有看到过 Don't get off 和 get off the bus 这两种表述，所以 off sb 到底在这个词组里是副词还是介词呢？

问题 which it is expected定语从句

They rolled out a product which it is expected would be beneficial for the blind.请问老师，it is expected是嵌入式定语从句吗？which引导的定语从句做it is expected的实际主语？

问题 一般将来时的句子中什么时候要加be

请问一下：一般将来时的句子中什么时候要加be？例如： He will be back in two days. 句型是 主语+will+动词原形+其他，back已是动词为何加be?

问题 while做并列连词时前面必须有逗号吗

She thought I was talking about her daughter, while in fact I was talking about my daughter. 这是卷子上的一个句子，句子能看懂。请问老师 while 前面必须有个逗号吗？查了几个句子都有逗号。谢谢老师。

问题 make sure 后面为什么用过去完成时

In future, I would make sure I'd checked out whoever was fitting it with their previous customers.请问 make sure 后面的从句中为什么用过去（完成）时而不用现在（完成）时？

问题 worth与worth of的用法

老师好，下面句子里，Huge progress has been made against these diseases since an agreement in 2012 by pharmaceutical firms to donate billions of dollars’ worth of drugs. “billions of dollars’ worth of drugs”为什么要加worth of？直接说 billions of dollars’ drugs不行么？...

问题 and是多余的吗（and to run pumps）

There is electricity in our house and to run pumps.这里为什么有and呢？去掉and不也是可以的嘛？

问题 句子成分分析

...当什么成分？A NATO official said that its policy towards Russia remained consistent that it had strengthened its defense in response to Russian aggression while remaining open for meaningful dialogue.我一开始的想法是that引导的是同位语从句，充当consistent的同位语，但...

问题 名词tour后面接什么介词(to还是of)

有这样一个句子：Clare is to make a tour to Australia, her mother has set her luggage in good train. 请问这里为什么用介词tour to呢？不是通常用介词of的吗？

问题 one可以指代不可数名词吗

句子：If you don’t like the drink you ordered just leave it and try a different one.在这个句子中，one 是指代 drink 吗？但问题是，drink 是不可数名词，那就是说 one 可以指代不可数名词，但这又是与语法书上的说法相违背的。这是为什么？

问题 lead与follow用作不及物动词的疑问

有这样一个句子：The mother led and her husband and children followed. 句中的 lead 和 followed 应该是不及物动词吧？因为它后面没有宾语。但读起来总感觉怪怪的。这个句子正确吗？

问题 是定语从句还是翻译有问题

...rs from distant lands,friends of old you have been summoned here to answer the threat of Mordor.  翻译是：来自远方的陌生人，被召集至此对抗魔多威胁的老朋友。根据翻译，friends of old(老朋友）应该被定语从句修饰，但原句中的you 引导的句子不...

问题 关于as的倒装的问题

Financial reports need not be publicly disclosed, as do the financial reports of publicly owned corpartions.这句话翻译为：“不像上市公司的财务报告必须公开”as do +.....翻译为“和...一样，像...一样”句子前半部分意为不用公开，但上市公司是要公开...

问题 祈使句中的动词原形是一般现在时态吗

Please shut the door. 请把门关上。这里的 shut 是一般现在时吗，还是只把它理解为动词原形没有时态。