Allen 家教

present simple

http://www.englishclub.com/grammar/verb-tenses_present_quiz.htm

http://www.usingenglish.com/quizzes/65.html

http://www.englishclub.com/esl-quizzes/grammar-1-present-simple.htm

http://www.ego4u.com/en/cram-up/tests/simple-present-1

http://esl.about.com/library/beginner/bl_bgpressimple.htm

http://www.englishtenseswithcartoons.com/exercise/present_simple_quiz


present progressive

Simple Present – Present Progressive

http://www.englishpage.com/verbpage/presentcontinuous.html