问题 主谓宾和主系表的疑问

She is swimming.是is swimming构成谓语，还是单独is是谓语？网上都是说is swimming构成谓语？要是非谓语swimming作表语，还是属于非谓语状态吗？

问题 为啥 this boy 用 it 指代

Who is this girl？She is my cousin. And who is this boy？It is me.为啥前面是she，后面是 it 啊!

问题 关于名词从句本质的讨论

...that，为什么要加that？假如把that去掉，上句就变成：English is important is an undoubted fact. 这句话就有两个中心谓语部分，即is important和is an undoubted fact。native speakers就会纳闷：你要表达的意思到底是“某个东西重要（something is importan...

问题 then 的语法分析

...e of the popular Beatles’ song “The Long and Winding Road”. ___56___ is so breathtaking about the experience is the out-of-this-world scenes. The rolling sea of clouds you see once you are at the top will remind you how tiny we ___57___ (human) are.The hot spring at the foot of the mountain is...

问题 There is nothing more exhilarating than to be shot at without result. —Sir Winston Churchill

There is nothing more exhilarating than to be shot at without result. —Sir Winston Churchill  这里at怎么理解，shot能不能用shotted呢？

问题 It is +形容词+非谓语动词作真主语

老师好!It wasn't so easy to travel in those days.it be adj 后面的真主语可以是动词不定式、doing和从句。本句若该为doing 做真主语：It wasn't so easy travelling in those days. 这样是否正确？另外，It be adj+真主语，这种结构有无特殊的用法，...

问题 win-win cooperation is the only choice for us, be

请问 be it in good times or bad是什么句式？求分析

问题 this is the seed that i do not know how tall will

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

问题 语法书中说amouns of 谓语动词用复数 那 这句话怎么理解 there is amoun

问题 请问，Her skin is pale,the texture of fine wax.后半句是什么

问题 defining what it means to be a good parent is undo

这里的defining what it 中it是什么语法成分，不懂这句话

问题 关于It is difficult to find a place suitable for a picnic的问题

It is difficult to find a place suitable for a picnic.这句话正确理解起来很容易，但有个语法点不明白，suitable for a picnic是修饰限定place的，看着形式像后置定语或者定语从句，但后置定语需要用非谓语动词（doing、to do、done），而suitable只...

问题 请问：如何理解这个强调句？

1，A teacher is a person whosr duty is to teach.2，A teacher is a person whosr duty it is to teach.两句之差只在it 上，书上说：第二个句子是第一个句子的强调句。请问：如何理解这个强调句的结构？

问题 It is/has been 5 years since...从句是短暂动词时的时态问题

老师，您好！关于It is/has been 5 years since 从句中如果是“短暂动词”，用一般过去时或现在完成时，含义究竟有何区别？大部分语法书都指出（包括薄冰，王福祯等）：在该句型中，since从句如果是现在完成时，不管是持续动词...