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问题 harmful是由动词harm还是由名词harm加后缀-ful变来的

I told him how ___61___ (harm) plastic could be to the environment and asked him to consider using more eco-friendly options.这是2021新全国卷2的语法填空题，答案填 harmful。请问这里的 harmful 是由动词 harm 还是由名词 harm 加后缀-ful变来的？

问题 get as是什么意思

有这样一个句子：You never know who you’ll get as a roommate; it’s just a matter of luck.有get as 这个搭配吗？但我在词典上没有查到，查了get和as这两个词。请解释一下这个get as的用法。谢谢！

问题 when 能不能引导原因状语从句

看到这么一句话：It was foolish of you to take a taxi when you could easily walk there in five minutes.有的说 when 是引导原因状语从句，有的说 when 不能引导原因状语从句，到底怎么回事呢？谢谢！

问题 句子分析(涉及可能是倒装句)

请问老师这句怎么理解？可以理解成倒装句吗？At it peak in 2007 it was worth some 65 billion, reckons Clare, founder of Art Economics, a research firm-double figure five years earlier.

问题 句子中是不是省略了什么

Reading a book reauires more intellectual efforts than watching TV, because with less visual and auditory aids we have broader scope of imagination.请问老师，we前面是不是省略了什么？省略了that吗?谢谢您！

问题 helping 现在分词是做伴随状语的用法

Mr March has lost most of his money helping a friend.其中的Helping这个现在分词是作为伴随状语吗？

问题 对2014高考句子的质疑：wave his arm还是wave his

...的句子出自2014年高考英语的新课标II卷：He was riding beside the bus and waving his arms.我对句中的waving his arms表示怀疑，我觉得句中的arms应用单数，因为从安全角度看，一个人一边骑车一边挥手，应该是只能挥一只手，不可能挥两只手...

问题 考题中regret to do与regret doing的区别

The boss told them some things he later regretted ______. A. telling    B. to tell     C. being told      D. having been told请问这是考查 regret 后接不定式 to do 和动名词 doing 的区别吗？在这道考题中如何区...

问题 have an aversion to do还是have an aversion to doing

She has a deep aversion to _______(get) up in the morning. 如何填？是填动词原形 get 还是填动名词 getting？

问题 arrive in+大地方；arrive at+小地方；那么arrive on+什么地方

介词的用法很灵活，是不是记住常用的就可以了？Three years later 117 men, women and children arrived on Roanoke Island,in the Virginia colony.老师，arrive in+大地方；arrive at+小地方；那么arrive on+什么地方?

问题 services with one another中的with该如何理解

...句子（摘自考研1999年英语一某篇文章）：More recently, as the Web proved to be more than a fashion, companies have started to buy and sell products and services with one another.【参考译文】最近，由于网络不只是一种时尚，公司间已经开始在网上互相交易...

问题 be going to与be going to be的区别

He says he's going________ a computer programmer in the future.a.to do b.become c.be  d.to be这个答案选择d，老师我想问下：to后面为什么还要加一个be动词。谢谢！这个be 动词在什么情况下要加！

问题 by reducing decisionmaking to one man’s whim,中to o

Some think that by reducing decisionmaking to one man’s whim, he has left the Saudi monarchy only a bullet away from collapse.

问题 Would have done结构的用法

...思一样吗？3, 章振邦，新编高级英语语法195页If I had won the lottery, I would have bought a yacht next year.请问里面完成体（Would have bought.）换成不定式的一般体Would buy可以吗？含义有没有差别？

问题 过去分词done与现在分词的被动完成式having been done有何区别

非谓语动词中，过去分词done与现在分词的被动完成式having been done有何区别？例如这句话中： Heated, the metal expands. 能不能说having been heated 不是都表先后发生，且是被动吗？