LET'S PRACTICE PRESENT PERFECT PROGRESSIVE AND PRESENT PERFECT

http://www.ego4u.com/en/cram-up/grammar/prepersim-preperpro/exercises
http://www.ego4u.com/en/cram-up/grammar/prepersim-preperpro/exercises?ex03
http://www.ego4u.com/en/cram-up/grammar/prepersim-preperpro/exercises?ex04
http://www.englishgrammarsecrets.com/presentperfectsimpleorcontinuous/exercise1.swf
http://www.ego4u.com/en/cram-up/grammar/prepersim-preperpro/exercises?ex05
http://www.ego4u.com/en/cram-up/grammar/prepersim-preperpro/exercises?ex06
http://www.englishgrammarsecrets.com/presentperfectsimpleorcontinuous/exercise2.swf
http://www.englishgrammarsecrets.com/presentperfectsimpleorcontinuous/exercise3.swf
http://www.englishgrammarsecrets.com/presentperfectsimpleorcontinuous/exercise5.swf