Present Tense Practice

This page has explanations of the simple present tense.
http://www.englishpage.com/verbpage/simplepresent.html

This page has a practice quiz. See how much you know!
http://a4esl.org/q/h/lb/psv.html

Which verbs do you know? Find out with this picture quiz.

http://www.manythings.org/vq/mc-v1.html