who sb. is是什么句式

Who is + 名词/代词/物主代词...?

表示:“谁是某某某”。它是特殊疑问句。

特殊疑问句是指以特殊疑问词开头，对句子中某一成分提问的问句。

Who is he?

He is my father/brother/uncle...

Who's =who is (问人是谁) ---Who is the boy? ---he's my brother.

Whose(问物品是谁的) ---Whose is the shirt? ---it's my brother's.

who是定语从句，修饰sb，表示“……样的人”

比如:

He who doesn't reach the Great Wall is not a true man.

不到长城非好汉。（不到长城的人）

The man who tried to have her killed is still at large.

那个企图雇凶杀她的男子仍然在逃。

相关例句:

1）那个邮差是谁

-> Who is that postman

-> Who is that postman?

2）那个邮差是我父亲。

-> That postman is my father.

3）那个司机是谁

-> Who is that driver?

4）那个司机是我叔叔。

-> That driver is my uncle.

5）那个学生是谁

-> Who is that student?

6）那个学生是约翰。

-> That student is John.

7）这个女孩是谁

-> Who is this girl

WHO一般用于疑问句中询问某人是谁。如WHO are you ?也可用来引导宾语从句，如：Tell me who you are.（此时WHO引导的句子要用陈述句语序）