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问题 ups and downs是怎样一个语法形式

Life is full of ups and downs. 人生充满苦和乐。请问老师， ups and downs是怎样一个语法形式？是类似与9-year-olds这样的名词形式吗？谢谢老师回答。

问题 为什么and前面用controlling,后面用to keep?

Voters have elected a divided government in Washington, with Democrats controlling the House and the presidency and Republicans favourites to keep the Senate.为什么and前面用controlling,后面用to keep?前面表现在进行，后面表将来?怎么感觉不是这样啊

问题 新概念英语第二册第69课 两个问题

...ird time. I had been asked to drive in heavy traffic and had done so successfully. After having been instructed to drive out of town, I began to acquire confidence. Sure that I had passed, I was almost beginning to enjoy...

问题 and not enough to 疑问

Only a  handful of databases record the abundance of insects over a long time—and not enough to judge long term population trends accurately.老师好，请问and 后只有一个副词enough吗？它的完整句子是什么样？

问题 宾语补足语的问题

请问老师，It was hard but preferable to her native EI Salvador. 中后面的 native EI Salvador 是 her 的宾语补足语吗？这句话中的 It 指代的是前文的 babysitting and bagging groceries, 因为前面句子太长我就不打了。

问题 如何理解hot and cold water（冷热水）

在一篇英语习作中看到：The hotel provides hot and cold water all day.我对其中的hot and cold water 有疑问：它要表达的意思应该是“冷水”和“热水”，即既供应“冷水”也供应“热水”，但hot and cold water（冷热水）给人的感觉是一种水—...

问题 后置定语修饰and结构先行词的界限

Peter and John from Australia are good friends.Peter and John you just encountered are brother.如上两句，请教如何判断后置定语是修饰John，还是Peter和John两者。谢谢！

问题 with knife and fork为什么没有冠词

Do all westerners eat with knife and fork?请问句中的 with knife and fork 为什么没有冠词？

问题 bread and butter作主语谓语动词用单数还是复数

Every day we had to have bread and butter, which was the only food they gave us. 句中的which was the only food they gave us是非限制性定语从句，修饰bread and butter；但bread and butter是两样东西，为什么后面的定语从句谓语用了单数was而没有用复数were呢...

问题 一个英语复杂句的理解与翻译（涉及modest,no less）

Of the several films Hirokazu has made about childhood and children, this one is the most modest, but no less pleasing for its delicate style and small setting主要是 modest 怎么翻译，还有后半句的翻译。谢谢！

问题 as可用于句末吗(后面不是该有名词吗)

So it is a bit confusing when Vos Savant fields such queries from the average Joe (whose IQ is 100) as, what's the difference between love and fondness; Or what is the nature of luck and coincidence?这个as是什么用法呢？后面不是该有名词吗？

问题 非限制性关系分句前面的and

He acted in two films, and one of which was directed by Zhang Yimou, didn't he?原文是一段高中听力原文。这个and是干嘛的？我认为是多余的，难不成关系分句还能和主句并列了？

问题 句子翻译疑问

... company's value that can not be accounted for by its current products and cash flow.这句话中的红色部分如何翻译恰当？以及红色部分的accountd for该翻译成什么比较恰当？这整句话的含义似乎也是有些不明白，看不懂，还求大神帮忙翻译下这整...

问题 boy do we need it 是什么意思(是否有误)

...etting enough sleep on a regular basis, the US Centers for Disease Control and Prevention says, calling sleep deprivation a "public health epidemic." 

问题 在这里when为什么用一般过去时而不用过去完成时

...'d bought when her hair was yellow. Now everything，her hair，her face，even her eyes，was the same color as the shabby ermine…….请问在这里When her hair was yellow，为什么不改成when her hair had been yellow.？是因为在这里when做时间状语修饰bought，表示在她头大...