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问题 这里的short story为何不用复数

Most critics agree that these stories served as models for the modern American short story and that both tales introduced imagery and archetypes that enriched the national literature (Bylington, 217). 请问：short 后面的 story 是否要变为复数？

问题 be essential to doing sth的用法疑问

Practice is essential to becoming good at something.老师，请问这里to 后面为啥加ing形式的becoming 呢？谢谢。

问题 对过去分词时间用法的疑惑

...中过去分词called只表示被动但我没有看出来过去分词发生的时间在谓语动词之前？请老师讲解一下，非常感谢。（听曹老师讲解过，过去分词要发生在谓语动词时间前，可是这个我没有看出，我只看出了被动）

问题 请帮忙划分两个句子的成分

... life.请哪位老师给这两个句子划一下成分，如有不好理解的地方，还麻烦给一点讲解，谢谢。

问题 nothing more adj than 的用法

They often spend entire afternoons on nothing more productive than mahjong.请问上面的句子是什么意思？我的困惑在 nothing more productive than mahjong。相关链接如下:http://www.yygrammar.com/Article/201105/2237.html 

问题 名词短语的成分分析（涉及同位语）

More than two million candidates have signed up for the upcoming exam around China, a 13.6 per cent increase from 2016, according to enol.cn.看着像是 more than two million candidates 的同位语，不知我理解对不对。

问题 have since been的用法（since放在谓语中间）

Perhaps all the deficiencies have since been rectified. since 在这什么用法？怎么在 have been 的中间？

问题 过去分词表被动与表完成的理解与区别

过去分词什么时候只表被动，什么时候只表完成，什么时候既表被动又表完成？形容词化了的分词和过去分词又有什么区别？ 

问题 be frequent to happen的用法有错吗

Sudden rainstorms are frequent to happen on the coast.有人说这里的 to happen 用法有错，请分析，谢谢！

问题 现在分词完成式(having won)的用法

Every president who took office in the 20th century did so having won the popular vote.请问这句话中的 having won 是什么用法，以及句子中发生事件(did so, having won)的时间顺序.

问题 be exposed to的翻译问题

Firstly, the festival can start with a 30-minute discussion where groups of students can exchange and share what they have been exposed to recently, expressing themselves freely. 老师，这里的 be exposed to 怎么理解呢？如何翻译呢？

问题 colored和colorful作为形容词使用修饰名词的区别

colored和colorful作为形容词使用，修饰名词，究竟有什么本质的区别？还是可以通用呢？

问题 关于any of的疑问

他没有告诉过我关于他朋友的事情He didn't tell me any of his friends.He didn't tell me anything of his friends.He didn't tell me any about his friends.He didn't tell me anything about his friends.这四句都对吗？

问题 Nobody...的反义疑问句

Nobody heard him sing, _________?A did one   B did he C didn't they D did they這道題选D。但是为什么nobay wants to go there, does he?也是对的。当这种复合不定代词做主语的时候，反义疑问句是they还是he?谢谢！

问题 it的用法（2020全国高考卷1的七选五）

2020全国高考卷1的七选五。请问老师，这句话里面的 it 作什么成份？We all want it to accept and love ourselves.