Скажите,что это не так 1.he visits his sister on saturdays 2.he must visit his sister today 3.he will visit his sister tomorrow 4.they want to visit sam today 5.i am busy today

1.He doesn't visits his sister on Saturdays.
2. Today he should not visit his sister.
3. He will not be visit his sister tomorrow.
4. They doesn't want to visit Sam today.
5. I'm not busy today.