I was a student when I was young. Now I am a teacher.
I went to the USA last year.
We ran five thousand meters yesterday.
He visited HIS father in Tapei yesterday. (Make sure you specify whose father he's visiting. We like our possessive adjectives in English.)
He likes to play basketball.
He was very weak last year.
He works hard everyday.
IT WAS RAINING when he went to school yesterday.
I WAS reading THE newspaper when the train stopped.
He was a Catholic when he was a child.
I liked to swim when I was young. Now, I don’t because I am too old.
Make sure you remember capitalization and punctuation. Other than that, you only missed a couple. Go over past progressive tense. Excellent job! :)