I（我）主语
am（是）be动词，属于系动词
in the school（在学校）介词短语作表语
句意为我在学校
类似句They are at the factory.
某人在某地都可以
I am at home, my father is at work, my mother is at school, We are all in China.
be动词随主语发生变化
匿名回答于2021-06-28 09:03:41
