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问题 It is estimated that...

_______as much as one fourth of all timber harvested is not use proved to be false. A.The estimate B.The estimate C.they are estimate D.It is estimated that   请问老师为什么不能选D?

问题 make sth possible的用法

Thus, the anthropological concept of "culture", like the concept of "set" in mathematics,is an abstract concept which makes possible immense amounts of concrete research and understanding.固定搭配是make sth possible, 句中把possible提前，变为make possible sth是什么用法？

问题 funding为什么不能用fund？

Romania's wetlands are coming back to life thanks to help from local communities, the world wildlife Fund, and funding from the European Union.请问老师这个句子的成分划分，还有funding为什么不能用fund呢？谢谢老师！

问题 如何判断主句谓语与定语从句非谓语关系

Phase I is ushered in by the effect which occurs immediately after you take the medicine.比如这个上面，occurs 非谓语动词与主句谓语ushered in 是同时发生吗？还是有先后？这种应该如何分析？

问题 developing和development的选择

您好，麻烦看下这两个句子：Further treatment will prevent cancer from developing.These are all symbols of the fast speed of development.这两个句子里的developing和development能互换吗？更进一步，如果是the speed of China's development，这个短语中的development能...

问题 must 表示“偏偏”的用法疑问

We were ready to leave, but the baby must catch cold. 我们准备要离开，可孩子偏偏得了感冒。The car must break down just as we were starting our holidays. 我们刚刚开始休假，汽车偏偏坏了。这个must被翻译成“偏偏”，好像在词典中没有查到这样的用...

问题 economics作主语时谓语动词可以用复数吗

The economics of the situation have to be considered.这个句子的谓语动词为什么用 have to，而不用 has to？economics作主语时谓语动词可以用复数吗?

问题 narrow sth down

The American Academy of Sleep Medicine offers a number of reasons that may be causing your particular variant of hypnagogic jerks. Unfortunately, the spectrum of explanations is so broad that it really doesn't help narrow down much at all.这句话最后的much是做narrow的宾语还是修饰at all...

问题 than 倒装句的理解难点

误：It is no more expensive than would the system you are proposing be. 正：It is no more expensive than would be the system you are proposing. 请专家老师分析一下这两个句子，“误”句错在哪里？“正”句为什么正确？句子是什么意思？谢谢！

问题 夸克《英语语法大全》：since时间从句作名词后置修饰语

...用。以下为夸克《大全》539页的说明：Apparent exceptions to the requirement of a perfective verb occur when a phrase or clauseintroduced by since correlates with a superlative or ordinal: .Yesterday was the hottest day since I came to live here.Joan came to work in her car last week fo...

问题 向曹老师请教若干英语难题

...不知我这样的想法对不对。2.Every precaution was taken against the failure of the plan. 此句中against the failure of the plan是主语补语吗？3.Are you sure of Simon's disappearance? 书上说of Simon's disappearance是表一sure的补语，我同样感到怀疑，因为我...

问题 something which可以省略something吗

The future is something which everyone reaches at the rate of 60 minutes an hour, whatever he does, whoever he is.请问句中的 something 可以省略吗？如果省略了，which 是不是由原来引导的定语从句变成表语从句？

问题 go on to do有么？

we have finished the first step. Let's go on (  ) the next.A.to doB.doing老师讲过一个事情没做完，继续做用doing，本题就是完成了一步，接下来再做，怎么用to do了呢？谢谢老师。

问题 although 与 out of 的搭配

老师您好，请问句子 Although out of commercial purposes,in trems of thr effect,it meets the social needs in the network era.中的Although out of commercial purposes中 although 是什么用法，以及 out of purposes 做什么成分?

问题 完成时加特定时间状语的用法

请问以下两句话加上特定时间状语是对的吗？ 【第一句】10 years ago, there has been a lot of pictures on the walls in this room.... 【第二句】 This place remains the same as it has been twenty years ago.