3RD SYSTEMS AND SCIENCES B

PAST SIMPLE OR CONTINUOUS
http://www.english-4u.de/past_prog_ex1.htm

PAST PERFECT AND PAST PERFECT CONTINUOUS PRACTICE
http://speakspeak.com/english-grammar-exercises/upper-intermediate/past-perfect-simple-vs-past-perfect-continuous
PAST PERFECT OR PAST PERFECT PROGRESSIVE  (VIDEO)

http://www.youtube.com/watch?v=8YnmtREaa9M

PRESENT, PAST AND FUTURE RVIEW GAMES
http://www.eslgamesplus.com/verb-tenses-interactive-grammar-game-for-esl-jeopardy-quiz-game/

http://eslgamesworld.com/members/games/grammar/perfectpast/present%20vs%20past%20tenses.html



ACTIVITIES
http://www.englishmedialab.com/preintermediatequizzes.ht