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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：
Both of them are teachers.
some (of them) are doctors,some (of them) are nurse.
天气预报查询提供全国天气预报,旅游天气预报,国际天气预报,天气资讯 ,天气预报网数据来源中国天气预报网，天气预报查询仅供参考!