DAW AND ASIR: PRACTISE ALL TENSES
http://www.saberingles.com.ar/exercises/202.html UPPER INTERMEDIATE EXERCISES http://speakspeak.com/english-grammar-exercises/upper-intermediate PAST PERFECT AND PREPOSITIONS https://tefltastic.wordpress.com/worksheets/grammar/past-tenses/past-perfect/past-perfect-preps/ PAST SIMPLE/ PAST CONTINUOUS: GAME http://www.eslgamesworld.com/members/games/grammar/New_Snakes_%20Ladders/Past_tenses.html MIXED TENSES: http://www.grammarbank.com/simple-tenses-quiz.html