every one in this room，every one of these books,every为限定词，one是代词加后置定语everyone不能与of连用，那么可以说everyone in this room,everyone on the second floor吗，此时everyone是什么词性？
Yet some experts don’t expect a children’s vaccine will be ready by the 2021 school year because of how long trials take, even on the accelerated timeline for Covid-19 vaccines. 黑体字是间接感叹句，还是，名词性关系分句？
麻烦老师帮忙分析一下句子成分。They boosted births among married
and unmarried women alike, and had no effect on the propensity of couples to
marry. 这个句子中，among married and unmarried women alike作什么成分，alike作什么成分，to marry作什么成分？
...should+do=现在或过去时间）It's lucky that the weather should be (=is/was) so fine.参考：https://www.cpsenglish.com/question/24188Donna 老师说：“...in case从句中...,事实上，should / might+动词原形这样的虚拟语气不仅可用来表示将来意义的一般现在时，...
The choice of distribution channel hinges on whom Chinese investors will ultimately trust.老师您好，请问whom前是不是省略了一个that，即that引导的宾语从句里包含了一个whom引导的定语从句。以上，谢谢！
These teens, with their "unattractive" and "fat" appearance and laughably bad singing skills, induce ferocious criticism, but at the same time, thrive on it.1) 句中的but at the same time用逗号隔开，作什么句子成分？2) with短语这里是表原因吗？
...in’by his classmates and told his brains must have leaked out of the cut on his head. Suddenly he discovered he could really learn and accomplish things. The result? From the last quarter of the eighth grade all the way through high school, he never failed to make the honor roll；in high school h...
...有虚拟语气）I’m really very busy, otherwise I would certainly go there with you. 我真是非常忙，否则我一定会和你一起去那儿的。（用了虚拟语气）
We didn’t know his telephone number; otherwise we would have telephoned him. 我们不知道他的电话...
句1: So far as I have been able to discover，there are only
four basic alternatives.这里面I have been able to discover 我能够发现的。但这里面为什么不用I have discovered？用have been able to是表示当时做某事的“能力”吗？其结果对现在产生影响（discover...