ONLINE EXERCISES

DO/MAKE

http://www.grammarbank.com/do-vs-make-exercise.html

http://a4esl.org/q/h/lb/mod.html

http://www.english-test.net/esl/learn/english/grammar/ei092/esl-test.php

TELL/SAY

http://a4esl.org/q/h/vm/tellorsay.html

http://www.grammarbank.com/said-vs-told-exercise.html

http://www.englisch-hilfen.de/en/exercises/confusing_words/say_tell.htm

http://www.ihbristol.com/free-english-exercises/test/esol-smc-say-speak-talk-and-tell

GERUND

http://www.englisch-hilfen.de/en/exercises/structures/gerund_infinitive2.htm

http://www.ego4u.com/en/cram-up/grammar/infinitive-gerund/exercises?21

http://www.englisch-hilfen.de/en/exercises/structures/gerund_infinitive.htm

CONDITIONALS

http://www.better-english.com/grammar/condit22.htm

http://speakspeak.com/english-grammar-exercises/upper-intermediate/zero-first-second-third-conditionals

http://www.ego4u.com/en/cram-up/grammar/conditional-sentences/exercises?06

FUTURE

http://www.isabelperez.com/happy/tenses/exercises/going-will2.htm

http://www.bbc.co.uk/apps/ifl/worldservice/quiznet/quizengine?ContentType=text/html;quiz=1158_future_hopes

http://www.bbc.co.uk/apps/ifl/worldservice/quiznet/quizengine?ContentType=text/html;quiz=1051_qnet_future

http://www.englishmedialab.com/Quizzes/advanced/futureforms.htm

http://www.esl-lounge.com/student/grammar/2g21-present-continuous-simple-for-future.php

PAST

http://english.lingolia.com/en/grammar/tenses-comparison/past-tenses/exercises/articles/past-tenses-mixed-exercise

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

http://www.learn4good.com/languages/evrd_grammar/presentp_exc.htm