问题 how to do it 和what to do

有这样一句：You have to know how to study. 好像固定搭配应该是 how to do it 和What to do 吧！为什么此句省略了study 的宾语？或是因为此时study为不及物吗？

问题 next to结构

A similar pattern is seen in the next to lowest income group,from 3.5 to 3.8 to 4 per 1,000. 请问这里的next to是整体做副词修饰lowest吗？还是next和to之间省略了什么？ from 3.5 to 3.8 to 4 per 1,000是pattern的定语吗？

问题 该用to use还是to be used

Additional combining forms are presented in this chapter to use in making words with suffixes. 此处to use应该是被用于的意思吧？是不是用to be use更合适？

问题 to do还是to doing

to什么时候是不定式的标志什么时候是介词？

问题 move to closing arguments 还是应该是 move to close arguments 呢？

VOA《Defense Argues Trump Not Directly Responsible for Capitol Violence》Senators had several hours Friday to ask questions of both sides and will move to closing arguments Saturday.老师： move to closing arguments - move to doing sth 是什么意思？ 这里用了介词to,而不是不定式to...

问题 was to 中的to 可以省略吗？

这是教美式发音的美国老师说的;This challenge was introduce somebody.是不是was后少了to呢？ 像这种to是必须有，还是可以省略呢？

问题 英语可以说 say sb to be / say sb to do吗

英语可以说 say sb to be 吗? 比如下面的句子：He said us to be wrong.I said him to be honest.They say her to have a lot of money.He said her to know the answer.He says her to live abroad.

问题 appear to be / seem to be 接名词时to be究竟能省略吗

... / seem 这类词在接名词的时候，究竟能否像接形容词一样 to be 可以去掉呢？(appear + n.)  我在网上搜索的时候，有的网站写接名词/形容词都可以省略to be，有的网站又写分情况（当名词前带有定冠词或物主代词修饰时），我被搞...

问题 to be playing to do it 怎么理解

But we need to be playing to do it.这连着的两个to都是宾语吗? 为什么它用进行时?

问题 to hold和to be held的区别

I will attend the meeting to be held next week.I will attend the meeting to hold next week.I will attend the meeting held next week.to be held / to hold/ held, 哪个表达是对的？如果都对的话，表达意思上有什么区别？

问题 appear to have done 和appear to do 的区别

原句：A desire to sell gold appeared to have been worsened by thinking that concerns about the Greek economy have somewhat eased. 此句中可以用appear to be 吗？Appear to have done 和appear to do 有何区别？谢谢老师精彩解答。

问题 to work/to working含义究竟有何区别？

请教老师：With many lawmakers facing tough reelection races,the incentives to work with the other side are few.不定式作定语。With many lawmakers facing tough reelection races,the incentives to working with the other side are few.介词to working.这样又变成了什么意思呢？怎么...

问题 tell B to A/announce B to A结构分析

请问老师，像tell B to A/announce B to A这种结构，to A应分析为介词短语做谓语动词的对象状语，当B结构比较长的时候，需要将对象状语移到B之前形成tell to A B、announce to A B的结构，老师我总结的对吗？另外to A是不是对于tell是必具...

问题 nice to see you,good to see you,glad to see you区别

问题 go(get) back to,go(get) back和back to区别

请教老师下面三个疑问:1.go back to,go back和back to区别这三者间用法有什么区别？2.当追溯到意时go back to,go back和date back to有何区别？3.get back 和get back to又有何区别？和go back to，go back的区别又是什么？