Yesterday I went to English acdemy. I studied English because I want to get a good grade.

So I went to English acdemy and studied hard yesterday (목적격 관계대명사,5형식 동사)learn but  it was hard and I don't understand

But  (목적격 관계대명사)is a little bit  understand but I don't understand (5형식동사)

So It  was very hard and difficult.