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主格
I like apples.
You are pretty.
He is a student.
宾格
The bird likes me.
The tiger can catch you.
I will tell him.
形容词性
I like my schoolbag.
She told him something.
They put theirs clothes up.
名词性
This pen is mine.
That ruler is his.
They took back theirs.
要造几个句子?