PAST SIMPLE AND PAST CONTINUOUS
http://www.5minuteenglish.com/mar10.htm
https://www.ego4u.com/en/cram-up/grammar/simpas-paspro/exercises?ex03
http://www.englishpage.com/verbpage/verbs3.htm
USED TO/ DIDN’T USE TO
http://www.perfect-english-grammar.com/used-to-exercise-1.html
MUST/ HAVE TO / DON’T HAVE TO
http://www.better-english.com/grammar/mustnt.htm
http://sites.uclouvain.be/gramlink/Gramlink-AN/exercices/auxmod/auxmod03.htm
https://www.englishclub.com/grammar/verbs-modals-have-to-must-not-quiz.htm
ACTIVE AND PASSIVE
http://www.englisch-hilfen.de/en/exercises/active_passive/active_or_passive2.htm
http://a4esl.org/q/h/vm/active-passive.html
http://www.englishgrammar.org/active-passive-voice-exercise-8/
http://www.english-4u.de/passive_ex6.htm
LINKS FOR THE FIRST TEST, 9TH CLASS
FILL IN THE STORY/ THE SENTENCES (all tenses):
http://www.eltbase.com/quiz/201_02.htm
http://www.english-grammar.at/online_exercises/tenses/t099-tenses.htm
http://www.englishlab.net/hp/quiz25_mixed_tenses_1_active.htm
PRESENT SIMPLE AND CONTINUOUS:
http://www.english-4u.de/pres_prog_ex6.htm
http://www.english-grammar.at/online_exercises/tenses/t065-present-simple-progressive.htm
RELATIVE PRONOUNS/ CLAUSES:
https://www.ego4u.com/en/cram-up/grammar/relative-clauses/exercises?07
https://www.englisch-hilfen.de/en/exercises/pronouns/relative_pronouns.htm
VERBS AND PREPOSITIONS
http://www.perfect-english-grammar.com/verbs-and-prepositions-exercise-1.html
subject and object questions:
http://www.esl-lounge.com/student/grammar/3g26-subject-object-questions.php