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问题 关于倍数以及百分比的理解与翻译问题

...示包括基数 100% 在内, 所以 four times longer than / as long as / the length of 都只表示“长三倍”；但若在 more / greater than 结构中用百分比，则表示净增数(见上例中最后一句)。

问题 18-year-old（18岁的）可以省略连字符号吗

在一篇短文中看到这样一句：Mr Smith has an 18 year-old daughter, who is studying the piano at college.按我的记忆，这里的 18 year-old 应该是 18-year-old 吧！为什么省略了一个连字符呢？

问题 与on arrival（一到达）类似的表达

...做某事就”“刚做某事就”。如：On arriving home I discovered the burglary. 我一到家就发现家中被盗。2. 但“on + 名词”好像也有类似表达，比如 on arrival（一到达，刚到达）。如：So that I shouldn’t worry, he phoned me on arrival. 为了不让我担...

问题 作表语的不定式为什么不带to（主语没有do）

《新概念英语》 第四册最后一课有个句子:The golden rule here is spread your risk. 请问为什么 is 后没有 to? 谢谢。

问题 时间状语从句和if引导的真实条件句可以有哪些时态

时间状语从句和if引导的真实条件句可以有哪些时态？主句若是过去时，从句会不会有用到过去完成时表过去已完成。如：He told me to wait until the manager had come back.谢谢老师回答！

问题 should you feel worse 是什么意思

There are now many patients waiting for consultation, we cordially request for your patience to wait for about 2~4 hours. During this period, should you feel worse, please call our nurses at the Triage immediately.我知道should you feel worse是if you should feel worse的省略倒装，但是这...

问题 介词后引导宾语从句时用how与whether的区别

We have to face the question of _____ they have found our secret. 给出的答案是填 how，但是我觉得这里填 whether 好像也讲得通。像这样没有明确上下文的名词性从句的题目是不是答案都不唯一？万分感谢！

问题 his hands crossed under his head分析

He was lying on the grass, his hands crossed under his head(=and his hands were crossed under his head).他躺在草地上，将两手交叉枕在脑后。不理解为什么是his hands crossed 呢？为什么是被动关系？不应该是主动关系his hands corssing...吗？

问题 to do还是to have done

... after doctors completed a 20-hour operation _______ one-year-old twins at the head.A. to separate B. to have separated  老师，您好。此题究竟选A还是选B，我一直困惑不解。有人说只可以选A，有人说必须是B。您的看法是什么呢？为什么？ 

问题 no more ...than的用法

They did no more to make themselves feel at home than the early American settlers who christened Little Rock and Salt Lack City. 书上翻译是他们的做法就如同早期到美国的殖民者为小岩城和盐湖城命名那样，让这两个地方听起来更为熟悉。 这就话为什...

问题 句子理解问题（is what it always is with women.)

She has her faults, and the greatest of them is what it always is with women.老师好，请问and后面的句子想要表达什么？

问题 have sth done还是have done sth

Mrs.Brown was much disappointed to see the washing machine she had ______ went wrong again.答案是repaired，为什么不能用it repaired呢?我的想法是这台洗衣机不是Mrs.Brown自己修的，而是她请人修的，所以填了had it repaired。

问题 当并列主语既包括过去又包括现在时谓语动词用什么时态

Both the ancient and modern Olympics____ held every four years.谓语动词用are吗？当主语既有发生在过去的事又有发生在现在的事时，谓语动词用什么时态呢？

问题 可以what+名词引导名词性从句吗

The scientists have absolute freedom as to what research they think is best to pursue.请问老师，这里的what是不是做名词性从句中pursue的宾语，还是把what research看作一个整体当名词性从句中is的主语（但是这样分析怪怪的，可以what+名词引导名词性...

问题 be good for doing 与 be good to do

This is because the juice from tomatoes is really good for making surfaces clean.请问句中的 for making 可以换成 to make 吗？