present+perfect+and+past+simple

= PRESENT PERFECT AND PAST SIMPLE =

http://web2.uvcs.uvic.ca/courses/elc/studyzone/330/grammar/upperf2.htm

http://www.englishexercises.org/makeagame/viewgame.asp?id=2959

http://web2.uvcs.uvic.ca/elc/studyzone/330/grammar/upperf2.htm

http://www.usingenglish.com/quizzes/228.html

http://web2.uvcs.uvic.ca/elc/studyzone/410/grammar/ppvpast1.htm

http://www.xtec.es/~eromo2/englishgate/elementary/pasts1.htm

http://www.englisch-hilfen.de/en/exercises/tenses/simple_past_present_perfect.htm

http://ingles.iesboliches.org/activities/grammar/tenses/simplepast_presentperfect.htm

http://www.esl-lounge.com/student/grammar/2g11-past-simple-present-perfect-gap-fill.php

http://www.autoenglish.org/gr.perf.i.htm

http://www.englishgrammarsecrets.com/presentperfectorpastsimple/exercise4.swf