Present Simple:

She works as a teacher at the local school.He eats breakfast every morning before going to work.They play tennis together every weekend.

Present Continuous:

She is currently studying for her final exams.He is cooking dinner for his family right now.They are watching a movie at the cinema tonight.

Past Simple:

She finished her project before the deadline.He visited his grandparents last weekend.They went on vacation to the beach last summer.