As it happens , we had been having a great number of cases of
diphtheria in the school to which this child went during that month.
请问在这里使用完成体和完成进行体的区别是什么？
完成进行体更强调事件在那个月里不断发生吗？还是本质区别并不在此？
...
Be they in the lab this morning? 他们今天早上在实验室吗？She can translate all these books into Chinese, be they in English, French or Latin. 她能够把所有这些书译成中文，不管它们是用英语写的，是用法语写的，还是拉丁语写的。貌似是一个倒装句...
The possibility that mass extinctions may recur periodically has given rise to such hypotheses as that of a companion star with a long-period orbit deflecting other bodies from their normal orbits, making some of them fall to Earth as meteors and causing widespread devastation upon impact.(1)”as t...
...injury ruled him out of Shanghai Shenhua's visit to Changchun Yatai in the Chinese Super League last weekend.过去式和过去分词长得很像，例如上句中的ruled。如果是过去式，那就是一句after引导的从句；如果是过去分词，那就很可能是一个after后面跟...
Before being put in prison, he begged the police to meet his mother.此处的 being put 为什么不能用过去分词 put？这不是符合省略句(从句主语和主句主语一致，且其后动词为be时，是可以将其主语及其后be省略的)的用法吗？为何此处before用作介词...
...o, so keen was my desire to follow her, and yet so deep was my longing for the woman whose spirit had truly companioned me and upheld my own. 1.书上是这么讲解这个句子的：So 开头引起部分倒装, 其结构是“主语补语+系动词+其他”，请问老师，到底是“主...
请问老师，There used to be beavers all over place是存在句吗？There used to be beavers all over place, um, somehing like two hunderd million beavers just in the continental United States.
...句子，没it则都是对句，有it则都是错句。为何不能有it?1.The train might be late，as it happened
yesterday. 上面这句为何不能有it?下边各句，都是不能有it。2. I have prepared a new plan，as it follows. 3.They lost money，as it was expected. 4.Don't
lose your pas...
Their child is at the stage ______ she can say individual words but not full sentences.（2019天津卷）stage作定语从句的先行词时且从句中不缺成分后关系副词究竟用when还是where?都可以的话何时用when何时用where?occasion后的关系副词又究竟是where还是whe...
例句：We want to know in which types of schools and for which kinds of students these growth mindset ideas help young people adapt to the challenges of high school.疑问：句子中加粗部分的语法结构不理解，请老师详解一下，谢谢！
I realized how
little time I had spent outside the university libraries and my living
place. 请问曹老师，这里的how 如何解释？如果是由感叹句转化而来的宾语从句，那么 how 不是只可以修饰形容词或者副词，what 后跟名词吗？琢磨不明白了。
Some people predict the extinction of family life as we know it today. 一些人预言我们现在熟知的家庭生活方式将会消失。从句翻译来看，这个句子中的 as we know it today 应该是定语从句吗？但对于 as 用作关系代词引导这类定语从句很不熟悉...
She told stories about the past and _______?A. what things used to beB. how things used to beB答案正确，但是A答案难道就因为却少介词 like 被彻底否定为错误吗？我记得有这样的句子：She is not what she used to be.be 与what构成系表结构。难道是因为 what ...
...This rope is twice as long as that one. 这根绳子比那根长一倍。The woman married a man poor as herself.We have to run as fast as possible.It is wise to seek help and counsel as soon as possible.老师，像这些含有比较状语从句的复合句...