Put the verbs in the correct form. 1. the students always (check up) their tasks in class. 2. the professor (check up) the papers after the exam. 3. he (check in) and went to buy a newspaper. 4. she (check in) when she comes to the airport. 5. you should (check out) before 11 a.m. 6. he just (check out) and is running after the bus. 7. find the books on the internet and (check off), then i'll buy them. 8. they (check off) the dishes and waited for the waiter to come.
2.checks up
3. Checked in
4.checks in
5.check out
6.has just checked out
7.check off
8.checked off