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问题 Up by与Up表示“上升”时的区别

老师好，当使用up表示提高时， Up by 30%为上升30%；   Up to 30%上升至30%， Up是否可以直接加百分数呢？如果有这个用法这里的Up 是什么词性呢？  如 the profits is up 30%.辛苦老师解答！

问题 时态疑问：句中应该使用动词bite还是bites

When there is an allergic reaction or when insects like mosquito bite, the itch receptors of that region send itch signals to the brain.句中应该用bites吗？ 即when insects like mosquito bites ?

问题 介词for的理解困惑

...otection says the majority of contracts have been awarded and construction is underway for approximately 1188 kilometers of border wall funded to date.请教老师：对于for approximately 1188 kilometers of border wall funded to date 这一部分，介词for的作用是什么？ 等同于about/on ...

问题 I wait for for an hour...这样可以吗

He is the man who / whom / that  I waited for for 3 hours. 这里不提前for， 连用两个for 自然吗？

问题 好题分享(02)：现在分词完成式与主句的关系

Having been hunted close to extinction, the Siberian tiger is once again common in this area. 有人认为common 应改为rare 或句首加上Although才符合逻辑。请问各位专家和网友怎么看？

问题 front-loading用法

...working or caring for others during the day - lolling about in the morning is front-loading that "me" time before responsibilities invade这句话的front-loading that什么用法？front-loading是动词吗？后面怎么可以接这个that?

问题 front-loading用法

...working or caring for others during the day - lolling about in the morning is front-loading that "me" time before responsibilities invade这句话的front-loading that什么用法？front-loading是动词吗？后面怎么可以接这个that?

问题 介词 to \ for \ of 构成的介词短语 在做定语时有什么区别

...句话中的 to The Economist 可以替换为 for The Economist 吗？I have written about this peculiarity in human nature before with my friend Dan Ariely, who studied this phenomenon extensively after noticing pricing for subscriptions(订阅) to The Economist.（参考书上说这里的 for subs...

问题 关于see后接不定式(see to do sth)的用法

前面有老师在牛津词典查到了下面的句子：It was getting dark and I couldn’t see to read. 天渐渐黑了，我看不见字，无法再阅读了。（http://ask.yygrammar.com/q-4014.html）请问一下老师，这个 see to read 中的不定式是什么成分？是宾语吗？谢谢...

问题 one more day和one day one的区别

I had only to hold out this one more day, and the whole nightmare for me would be over, though it would go on and on for millions of others.  1. one more day 的more是形容词吗？one day more的more也是形容词吗？2. one more day和one day one的有什么区别？

问题 be required for与be required by的区别

... required for the Big Bang,first put forward in the 1920s,to maintain its reign as the dominant explanation of the cosmos.实际上，巨大的宇宙云的存在，是20世纪20年代首创的“大爆炸论”得以保持其宇宙起源论的主导地位所不可或缺的。请问上面句子...

问题 for sb to do sth可以放在句首作主语吗

For the bride to wear white s customary。这个句子对吗？是不是一定要改成下面这样？It’s customary for the bride to wear white. 新娘穿白色衣服，这是风俗。 换句话说，for sb to do sth可以放在句首作主语吗？有哪本语法书有类似的介绍吗？

问题 这个none后是否要加that引导的一个定语从句

Of all the movies Hepburn made none is more memorable than “breakfast at tiffany's”.我怎么感觉 none 后面要加 that 然后引导一个定语从句呢？

问题 关于如何理解for months 修饰成分

刘老师在解答This is the first time that I have felt really relaxed for months问题时，认为“the first time是“数月来的第一次经历”，时间状语for months 只是把时间限制在这段时间范围内而已”，请问为什么不认为for months 修饰have felt. 这句可...

问题 as...as 前面为什么没有动词 be

I click on the modem, the once-annoying sound of the connection now as pleasant as my favorite tune.请问老师，第一个as前面为何少了is？是因为名词短语作状语省略了？谢谢老师为我们指点迷津。