问题 复数名词前必须加冠词吗

We consider horses ______ useful animals.A．theB．anC．/D．a在这道题里，horses是复数，这和useful animals之间是零冠词还是冠词？

问题 定语从句的疑问

今天看到一个例句He had three years in which to establish himself as Prime Minister（他有三年时间来确定自己首相的地位），在这里，in which后面没有接上一个完整的句子，而且如果把in which去掉句子也完整，在这里in which反倒像一个插入语，...

问题 that的用法

It is human,perhaps,to appreciate little that which we have and to long for that which we have not.这句话中首先可以确定to do是真正的主语，但是that和which we have 不是很重复吗，直接用which we have从句作为appreciate的宾语不可以吗

问题 food与foods的用法

Stoves are used to heat food and refrigerator are used to keep foods cool or cold.请问在这句中food为什么有单复数的区别？

问题 such as的语法分析

Children do not use inflections such as are used in mature adult speech.请问句子中的such as属于什么用法，such as是习语吗？它们作什么成分？

问题 It is what is not there which will raise some eyeb

这个成分怎么分析，觉得好绕口啊谢谢。

问题 教材中的一个长句子的分析

...tablished a mathematical approach to the analysis of physical phenomena in which he stated that it was unnecessary to introduce final causes that have no experimental basis.上述的句子我想了好久但是仍然存在疑惑, in which在这里使用, which指代的是前文的mathematical approac...

问题 from where 理解

....传统的语法书中说关系副词 where引导定语从句，where = in which, on which, at which例如：This the city where I met Mary.这里的city 等于 in which.They returned to the point where they had started from. 这句话 原则上应该等于They returned to the point at whi...

问题 关于where,which引导定语从句的区别与分析

...个 caucus 的作用，如果这个党还有别的 caucus 的话，那用 which 不行么？这里使用 where 有何弦外之音吗？

问题 It depends on an issue of which is the best.是个什么从句

问题 定语从句还是现在分词作定语

这是定语从句还是现在分词作定语修饰signs呢?Signs barring cell-phone use are a familiar sight.这句话感觉有问题啊，barring cell phone use 是什么成分，怎么翻译呢？

问题 句式分析

...re is enough. They must hear a language quite a bit to understand it—and use it often to be able to speak it comfortably.我请老师分析粗体部分句子结构，use it often to be able to speak it comfortably，我晕。

问题 语法分析：was done doing

The monument was constructed using marble from different states to symbolize unity after a divisive Civil War.was construed using是什么句型？

问题 at the back of my refrigerator是什么意思

... their last days. Curtin is CEO of DC Central Kitchen in Washington, D.C., which recovers food and turns it into healthy meals. Last year it recovered more than 807,500 pounds of food by taking donations and collecting blemished (有瑕疵的) produce that otherwise would have rotted in fields. And ...

问题 请教对一句话的理解

请教这句话里单词used是否表达动词的被动语意：被使用的意思，如是这样，后面单词单词different因为是修饰动词use的，所以应该是用副词形式differently。请教我对这句话理解有无错误，请具体讲解。