问题 be quick to do sth中的不定式作什么成分

Sam was quick to reply.请问老师这个句子结构是怎么样的。quick是表语，to reply是什么成分，和quick什么关系，多谢

问题 lead to sb doing sth句子成分

It leads to people buying in bulk without intention of eating them, and clips emerged of people throwing food away.请问老师：leads to people buying in bulk作什么成分，without intention of eating them是作什么类型的状语？of people throwing food away是什么成分呢？

问题 被动变主动

when you look into a mirror,your image is reflected back to you. 后半部分变成主动句:1.The mirror reflects your image back to you.(back做副词修辞谓语，to you做状语) 2.The mirror reflects back your image to you.(reflect back做动词短语) 3.The mirror reflcts back to you your ...

问题 sorry to leave you so long 有问题吗

Sorry to leave you so long.请问这个句子有问题吗？

问题 do 30 miles to the gallon可以用get吗

Her car got sixty miles to the gallon. 她的汽车每加仑油行驶 60 英里。这里为什么用got？不是用did吗？

问题 难理解的 with which to do sth

She hasn’t got enough money with which to buy the car. 她没有足够的钱去买车.老师这里为什么用到 with? 定语从句关系代词要在句子里要作成分，但这里的先行词which在句子里做什么成分?

问题 be scheduled to do sth中的不定式作什么成分

The flight is scheduled to land at 5:00PM.to land at 5:00PM 这个不定式是句子的什么成分呢？

问题 than is necessary to do sth的分析

剑桥高阶英汉双解词典（第四版）在解释 scrimp（过度缩减开支）时用了这样一句：to save money by spending less than is necessary to reach an acceptable standard（过度缩减开支）。我不明白为什么这个than后面省略了 it ，但保留了不定式。不是...

问题 remember doing/having done/to have done的区别

所有语法书上都有remember doing sth＝remember have done sth＝remember to have done sth.学生认为还是有区别的，前者仅仅表示过去一般的动作，而后两者表示过去某个动作对现在的影响，就好比过去一般时态和现在完成时态的区别。...

话题 it is +adj. +(for/of+sb.)+to do sth.

话题 has/have/had (never) known sb/sth (to) do

话题 someone has never spent time unable to do something

问题 be heard to do sth 与 be heard done 用法的疑惑

—The plan is heard _____ so well that we don’t have to make any changes.     — It is indeed.A. to design         B. designing      C. designed         D. design     这题选 C，但是 sb is heard to do st...

问题 关于不定式中的形容词+to do结构的用法疑问

The book is interesting to be bought.可以这样用吗？

问题 这里的介词for怎么分析或理解？

...ty so alien to the traditions of his calling. "Don't you believe it. He'll come back, and, as Dorothy says, I dare say he'll be none the worse for having had a bit of a fling."请教老师：在 putting into the word all the contempt he felt for a quality so alien to the traditions of his calling ...