Add -s / -es  to the following verbs

Exercise 4. Add -s / -es  to the following verbs.
1 . teach ____________ 9. buzz ____________
2. fly ____________ 10. watch ____________
3. run ____________ 11 . sit ____________
4. push ____________ 12. guess ____________
5. fix ____________ 13. stop ____________
6. do ____________ 14. worry ____________
7. dance ____________ 15. finish ____________
8. go ____________ 16. have ____________