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问题 must表推测不能用于否定句中吗？

...message about her. They don't know what has happenedto her. A. must not have received B. ought not to receive C. not ought to have received D. not ought to receive A [译文]她的父母一定没有收到任何关于她的消息，他们不知道她出了什么事。 [解析]选...

文章 高中英语新教材-词汇教学参考资料-北师大版-必修1-Unit 2

...单词的链接即可查阅相关教学参考资料。●Topic Talk▲athlete                  ▲frequency▲prefer                    ▲rather than▲badminton           ▲golf▲gymnastics          ▲jog▲cycle                     ▲bowling▲skate...

问题 难句分析(涉及that引导的定语从句的先行词以及代词they的指代)

There is a more fundamental question: is there a better system for creating incentives to produce life-saving medicines priced at a level that means they can reach everyone?请问：(1) that 引导的定语从句的先行词是？(2) they 指的是？

问题 that引导从句的时的词性区分（连接词、连接代词、连接副词、从属连词、关系代词/副词）

that引导从句的时的词性如何识别？如何确定它连接词、连接代词、连接副词、从属连词、关系代词/副词？这几个概念把我弄混了，有点想不清楚。他们之间到底什么关系，有什么区别？另外 that 到底属于哪一种连词？

问题 这两个定语从句是不是限定性定语从句和非限制性的结合

That, in turn, came amid an outbreak of restiveness among the developers who provide software to Apple users, and at whom the WWDC is ostensibly aimed.一个是who引导的限定性定语从句，at whom引导的是非限吗？

问题 In addition to being the perfect...(being是什么用法)

...？In addition to being the perfect gift for the occasion, also remember that gifts are memorable. They may cost you little but would be priceless to the receiver, who recognizes their value as a sign of your affection, love, and thoughtfulness

问题 and的使用

Collage is an investment and a time commitment. 这句话里主语是单数，但是表语里有and，表语是复数，不应该把and变为or吗？谢谢解答。

问题 难句分析：There is a worry that summit decisions could

There is a worry that summit decisions could set in motion a process that sends the single market into reverse.  这句话里set in motion a process 做什么成分？set in 作为一个整体，是“开始”的意思，之后的呢？  

问题 A为什么错

At this time next week we _ the final exam in the classroom.A.shall have hadB.shall be havingC.are havingD.have

问题 each作什么成分

请问老师:You can't have one each. We haven't got many.句中的each作什么成分？是同位语吗？那我说成You each can't have one.可以吗？谢谢老师！

问题 want to A and B 和 want to A and to B 哪个是正确

专业老师好！want to do sth and do sth和want to do sth and to do sth，哪个是正确？请问，want后用and连接两个动词第二个动词还用加to吗？有疑惑，望解答，谢谢。

问题 all后接数词时要不要定冠词

请问专家: all 后接数词时要不要定冠词? 比较:I bought all three.I bought all the three.I’ve read all five novels by Jim Smith.I’ve read all the five novels by Jim Smith.

问题 倒装句 out of which come... 的用法疑问

...紧接着又有一个例句：e. g. The hens lay eggs, out of which come other chickens.这两个例句都有“come out”这个短语，然而第二个句子把out of提前，第一个句子却没这么做，这究竟是哪里出了问题，请求老师解答！

问题 mother and son可以不用冠词或物主代词吗

Mother and son lost contact when Nicholas was in his early twenties. 尼古拉斯20岁出头的时候母子就失去了联系。这里的mother and son（母子）前面没有用冠词，好像原来见过，father and son（父子）也不用冠词的，这是一种习惯吗？如果是 mother and ...

问题 as it happens与it happens that…的区别是什么

as it happens 和 it happens that…都可以表示“碰巧”，它们有区别吗？