backlog an accumulation of jobs not done or materials not processed that are yet to be dealt with (especially unfilled customer orders for products or services)老师好，我知道yet是非肯定词，这里表示的就是一种不确定会不会被解决的状态是吧
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？
We live in an age of rapid technological advance/advancement.advance本身可做名词，表示“发展”的意思，advancement在advance后加后缀，构成名词，也有“发展”的意思，那么，advance和advancement两者在表达上有什么区别？
... the bridge were packed with cars, it
would still only be carrying a third of its total capacity.请问老师，这个句子使用were packed，也就是使用了从句用did的虚拟语气，无论现在还是将来，桥上挤满了车都是不可能的，那我要怎么区分它是对现在还是...
请问老师，在一些外国网站看到了这样的句子：
The security of the organization is expected to be attached great
importance.
请问后面需不需要加to？
Why should those principles be attached importance? 这句需要加to吗？为什么？
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？
...亲已变得很健忘很糊涂了。※真题例句※the
confused owner of a cone five hundred feet high 一个五百英尺高的圆锥体的糊涂主人
(2019江苏卷阅B)“What’s this
place?” I asked, still confused. “这是什么地方？”我依旧困惑地问道。(2018天津卷阅B)(...
“That is what Mr. Hilton Cubitt, of Riding Thorpe Manor, Norfolk, is very anxious to know. This little conundrum came by the first post, and he was to follow by the next train. There’s a ring at the bell, Watson. I should not be very much surprised if this were he.”这正是希尔顿...
... United States regards intellectual property as a basic strategic resource of the country, strengthens intellectual property protection as an important competitive means, and deepens intellectual property management, especially patent management, as an important means to guide scientific and technol...
请问any用于肯定句，后跟名词单数还是复数？比如这句话：We can do a wide variety of things for our clients: we can type all their letters and prepare any documents that they might need sending out.