主系表结构.
I am a man of high quality.
He is a boy of 16 years old.
She is a girl of 10.
We are friends of theirs.
You are a teacher of that school.
主系表结构.
I am a man of high quality.
He is a boy of 16 years old.
She is a girl of 10.
We are friends of theirs.
You are a teacher of that school.