PRE-INTERMEDIATE

Should

http://www.englishexercises.org/makeagame/viewgame.asp?id=1734
http://www.english-grammar-lessons.com/should/exercise1.swf
http://www.english-grammar-lessons.com/should/exercise2.swf
http://www.english-grammar-lessons.com/should/exercise3.swf
http://www.english-grammar-lessons.com/should/exercise4.swf
http://www.english-grammar-lessons.com/should/exercise5.swf
Had Better
http://www.englishgrammarsecrets.com/hadbetter/exercise1.html
http://www.englishgrammarsecrets.com/hadbetter/exercise2.html
http://www.englishgrammarsecrets.com/hadbetter/exercise3.html
http://www.englishgrammarsecrets.com/hadbetter/exercise4.html
http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-25303.php
Passive Voice
http://elt.oup.com/student/englishfile/preint/a_grammar/file07/grammar07_d01?cc=global&selLanguage=en
http://elt.oup.com/student/englishfile/preint/a_grammar/file07/grammar07_d02?cc=global&selLanguage=en
http://www.autoenglish.org/gr.pas.i.htm
http://www.ego4u.com/en/cram-up/grammar/passive/exercises?simple-present
http://www.ego4u.com/en/cram-up/grammar/passive/exercises?02
http://www.ego4u.com/en/cram-up/grammar/passive/exercises?05
First Conditional
http://www.englishgrammarsecrets.com/firstconditional/exercise1.html
http://www.englishgrammarsecrets.com/firstconditional/exercise2.html
http://english-quiz.net/conditionals-first-test.html
http://english-quiz.net/conditional-first-test.html
http://www.englishgrammarsecrets.com/firstconditional/exercise3.html
http://www.englishgrammarsecrets.com/firstconditional/exercise4.html
http://www.esl-lounge.com/student/grammar/2g24-first-conditional-exercise.php
http://www.learnenglish-online.com/grammar/tests/1stconditional.html
https://elt.oup.com/student/englishfile/preint/a_grammar/file06/grammar06_a01?cc=global&selLanguage=en

https://elt.oup.com/student/englishfile/preint/a_grammar/file06/grammar06_a02?cc=global&selLanguage=en

Question Tags

http://www.englisch-hilfen.de/en/exercises/questions/question_tags3.htm

http://www.englisch-hilfen.de/en/exercises/questions/question_tags2.htm
http://www.englishgrammarsecrets.com/questionstags/exercise1.swf
http://www.englishgrammarsecrets.com/questionstags/exercise2.swf
http://www.englishgrammarsecrets.com/questionstags/exercise3.swf
http://www.englishgrammarsecrets.com/questionstags/exercise4.swf
http://www.englishgrammarsecrets.com/questionstags/exercise5.swf
http://www.englishgrammarsecrets.com/questionstags/exercise6.swf
http://www.perfect-english-grammar.com/question-tags-exercise-1.html
Exclamatory Sentences 
http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-22005.php
http://www.englishpage.com/minitutorials/sosuchexercise.htm


Past Perfect Simple
http://www.adelescorner.org/grammar/past_perfect/past_perfect.html
http://www.ego4u.com/en/cram-up/grammar/past-perfect-simple/exercises?03
http://www.ego4u.com/en/cram-up/grammar/past-perfect-simple/exercises?05
http://www.ego4u.com/en/cram-up/grammar/past-perfect-simple/exercises?04
http://www.ego4u.com/en/cram-up/grammar/past-perfect-simple/exercises
http://www.perfect-english-grammar.com/past-perfect-exercise-1.html
http://www.englishgrammarsecrets.com/pastperfect/exercise2.html
http://www.myenglishpages.com/site_php_files/grammar-exercise-past-perfect.php
http://www.ego4u.com/en/cram-up/grammar/irregular-verbs
Past Perfect Simple vs Past Simple
http://www.englisch-hilfen.de/en/exercises/tenses/past_perfect_simple_past.htm
http://www.englishpage.com/verbpage/verbs11.htm
http://www.englishgrammarsecrets.com/pastperfect/exercise1.html
http://www.englishgrammarsecrets.com/pastperfect/exercise3.html
http://www.englishgrammarsecrets.com/pastperfect/exercise4.html
http://www.englishgrammarsecrets.com/pastperfect/exercise5.html
http://www.englishgrammarsecrets.com/pastperfect/exercise6.html

Listening
http://www.myenglishpages.com/site_php_files/listening-rio-olympic-games.php