以代词为主语的英语句子

人称代词:
I am a student.
You are a teacher.
He is a worker.
She has a dog.
They will go to Beijing.
指示代词:
This is Mary.
That is my coat.
疑问代词:
what is this?
不定代词:
【以代词为主语的英语句子】Both of them are teachers.
some (of them) are doctors,some (of them) are nurse.
代词做主语的句子有哪些?I am a student.
You are a teacher.
He is a worker.
She has a dog.
They will go to Beijing.
指示代词:
This is Mary.
That is my coat.(可以替换成these或those)
疑问代词:
what is this?(when,wher