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问题 两个动词为什么直连用在一起

This was combined with ground-up mammal bone, the traces of which show signs that it was heated being ground.例句中 be heated 后为什么能直接加另一个动词 being ground，此处是省略了and对吗？

问题 for在句中的含义，可以用其他介词代替吗

The government relies on taxes from the food industry for more than half its budget.

问题 破折号可以用在表语提前的句子中吗

it is difficult to be sure about radiation damage-a person may feel perfectly well

问题 时态的问题

...ty ______ (work) really hard on his book and he thinks he'll have finished it by Friday.A. is working    B. has been working请问：此题如何选择答项，并解释。谢谢！2. We have decided that the headmaster _____ (award) the prize to those gifted students at the meeting tomorrow.A. w...

问题 请问这句话如何理解

Three days later, London housewife Luisa Carlill went down with flu. She was shocked. For two months, she had inhaled thrice daily from a carbolic smoke ball, a preventive measure guaranteed to fend off the flu-if you believed the advert, which she did.请问: 这里的a preventive measure guarantee...

问题 介词like后面可以接不定式吗

What is it like to work for a boss who is much youger than you? 请问这个句子中的 like 是介词吗？如果是介词，那它后面为什么接不定式而不接动名词呢？

问题 because在这里有什么作用

Not only is smoking bad for your health,it's the source of social  problems in developing countries because, since profit from tobacco is very high, tobacco has taken up the best food-growing areas,leading to food shortages.请问 because 在这里有什么作用？

问题 分析成分（from customer paying to park）

它并不通过用户付停车费盈利。It doesn't make money from customer paying to park. 这个from后面是从句还是什么？

问题 if条件句疑惑

If he can't chop vegetables with one hand he simply uses his feet.这篇文章讲的是一位残疾人士的生活。请问该句属于0条件句吗？（没有用he will simpy use）请问什么时候用0条件句呢?我有点迷惑。谢谢！这句却要用将来时：If you open it, you will...

问题 hand 作及物动词与不及物动词的疑问

"Hand in your homework!" she repeats 3 times to emphasize its importamce.老师，如何理解 hand,及物动词吗？为什么没有宾语的？

问题 worth前的货币写法疑问

Maezawa said his promotion on Twitter was a show of gratitude after Zozotown sold 10 billion yen worth of merchandise during its New Year's sale. 这里的10 billion yen worth与10 billion yen' s worth有什么区别，两种写法都可以还是第一种对？请老师解答一下

问题 if从句可不可以用进行时表将来

We want to go to the beach tomorrow,but we won't go if it is raining.如题，这句话对吗？

问题 is 后跟动词原形的疑问

All he wants to do is make love.All you're going to do is highlight it.All I have to do is learn English.我注意以上句子is后跟的都是动词原形，我不了解这一语法背后的知识，请老师解疑答惑，如果举几个例句方便理解就更好了，感谢！

问题 非谓语动的不定式

comparison may make something appear more beautiful than it is when  ______ alone. A.to seeB.seeingC. is seenD. seen为什么选seen，虽然语境是这样（see 不应该是不及物动词吗？、知道look是不及物动词），麻烦凡哥讲解一下

问题 同位语远离修饰词

...have been through to headings rather than the full story, a document which it shelves in remote locations of the inner library.这里a document是our mind liking 的同位语嘛？还想请教一下，同位语可以指代句子，从句，短语等等吗？谢谢了！