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问题 take that next step中的that是什么句子成分

A positive response to a new idea from an engineer, a venture capitalist, or just anyone listening, is often enough to motivate someone to take that next step.上文中的 that 是什么词，什么句子成分，去掉可以吗？谢谢回答。 

问题 表示推测时must与have to可换用吗

If he is not at home, he ______ be at work. A. must   B. can   C. has to   D. shall 答案是 A，请问可以选 C 吗？记得老师曾说过，表示推测时 must 与 have to 有时可换用的。

问题 一个句子明明有谓语为什么说它少谓语呢

...案说的不清楚，说句中少谓语，难道 can be used 不是谓语吗？Unlike fossil fuels, which can be used only once, wind and solar power _______ of energy.A. for renewable sourcesB. the sources are renewableC. are renewable sourcesD. renewable sources

问题 the first of which后接were还是was（主谓一致）

With the publication of famous Leather-stocking Tales, the first of which were The Pioneer, the second The Last of the Mohicans, Cooper established his reputation as the first major American novelist.请问：句中的 were 可以改为 was 吗？

问题 need sth for sb和need Sth to sb有什么区别

We need some information for him.We need some information to him.这在句意和组成成分上有区别吗？

问题 draw the different falls of light怎么理解

... different falls of light 怎么理解呢？draw在这里表示“绘画”吗？谢谢老师!

问题 It seems as if...与It seems that...有何区别

It seems as if...与It seems that...有区别吗？如：It seems as if everybody else knew except me. It seems that everybody else knew except me. 

问题 动名词短语和不定式作宾语时区别界限是什么

She was very thrifty and did not like spending money.老师把动名词短语改成不定式可以吗？to spend money?老师，除特殊情况外（remember,forget,regret,stop..等作宾语使用时两都不相同），大部分都可以两种情况互用吗（作宾语，表语时）？

问题 as adj as doing和as adj as to do

Money isn't as valuable as knowing who to trust.Money isn't as valuable as to know who to trust.都可以吗?

问题 The government prevents them from hunting. 中from hunting作什么成分？

The government prevents them from hunting. 中from hunting作什么成分？与We should hide from dogs. 在句子中成分一样吗？

问题 rather than 是复合介词还是并列连词

...连词，省略了什么。如果是介词，介词后面又可以跟副词吗。2. the other way around中around是什么词性作什么成分，the other way是作名词成分，还是省略了in 构成介词短语作状语？

问题 It is fun to do与it is fun doing比较

It was great fun walking along the streets, enjoying the relaxing atmosphere!请问句中的 walking 可以换成 to walk 吗？

问题 Might wanna do something about the pea soup.为什么没主语

Might wanna do something about the pea soup.为什么没主语？这句是祈使句吗？

问题 Too glittering, it now seems

... Too glittering, it now seems, for the CPRF. 黑体字部分是表语前置吗？表强调。it指什么呢？谢谢各位大咖专家老师！

问题 不定冠词置于such, what, many, not, too, much of等之后

“不定冠词置于such, what, many, not, too, much of等之后”其中many，too，much of 怎么表示呀，可举几个例子吗?