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问题 natural son（亲生儿子）与natural father（亲生父母）

▲He’s not our natural son; we adopted him when he was three. 他不是我们的亲儿子——他3岁时我们领养的。 ▲这个句子很有意思，原来汉语的“亲儿子”在英语中叫natural son。当然也可以说natural daughter, natural child, natural ...

问题 关于独立主格的用法讨论（gun in hand）

Fighters do not necessarily go to battlefield （with）gun in hand.老师好，最后是写成独立主格合适还是复合结构合适？

问题 关于abililty后面偶尔接of doing sth的权威例句

...不少书说 ability 后面通常接不定式作定语，但偶尔也接 of doing sth。但我查了很多资料，只在国内书上见到过有人说“偶尔”也接 of doing sth，从未在英语国家出版的书上看到过后接 of doing sth 的说明或例。今天特请专家们给讲解...

问题 by means of 是介词吗

在一本资料上看到，说 by means of 是介词，但我在词典上怎么没有查到它是介词呢？

问题 last summer;next spring等词前面为什么不加不定冠词(the)

It was the last term that he transferred to a boarding school.这是一句中译英（中文我没打出来）。为什么这句句子里我在 last term 前加 the 不对？

问题 leaving 的用法和意义

...这句话的含义，谢谢。Here a flat-plate, fixed solar collector at the best average tilt angle toward the south will often suffice, leaving only small efficiency improvements to be achieved by the fairly costly tracking or concentrating methods.

问题 one's sense of duty是什么意思

If you ant children to work hard you must appeal to their interest instend of their ______ of duty.答案为 sense，为什么？这句话说得通么？

问题 分数词用法

It is 70% off-the-shelf,much of it coming from Silicon Valley.请问老师，这个70%是什么成分？

问题 弟弟打开电脑的声音

the sound of后面应该怎么接弟弟打开电脑呢？

问题 句型分析

There are three kinds of fruits on the table, apple, orange and banana.请问这个句子正确吗？如果正确的话逗号后面这个三个名词做什么成分?

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 为什么句首的contiune用-ing形式

The measures included: continuing to promote the balanced development of compulsory education.......为什么句首的 contiune 用 -ing 形式，原型可以吗？

问题 as 非限制性定语从句

_____ has been stated in the annual white book,our national defense budget per year is well below the average of develpoed countries.选项是as ,如果我想用as it has been.......这个句型，不是as引导的非限制定语从句，原句子怎么改？

问题 为什么用sat不用sitting

语法The old man sat in front of the television every evening, happy to watch...这里为什么用sat 不是 sitting？是不是有错误？如果无误，那么这是什么用法？做什么成分呢？还有这句话里逗号是个什么意思？是为了防止句子歧义吗？

问题 是现在分词做定语还是动名词做定语

The body of one status was found among remains dating from the fifteenth century B.C.这句话中，dating是现在分词还是动名词？为什么不是date from？