Past simple (present simple), Please correct it .
He abandons his job to go to classes.
He abandoned his job to go to classes. (He left work to go to classes.) You would say it like this if he is just taking a short break. If he is leaving his job permanently to go to classes you would say ¨he left his work to return back to school.¨
She asks about English homework
She asked about English homework. (correct)
They enjoy playing football with their friends
They enjoyed playing football with their friends. (correct)
you improve you skill to speak this foreign language.
you improved your skill to speak this foreign language. (correct)
I knock the door of my school. I knock the my school`s door (What of this is correct)
I knocked the door of my school. I knocked the my school`s door
(I knocked on the school door.)
Thanks to all Your help. already that is very important for me