11 graders: exercises of mixed verb tenses

Hi

you should do exercises where all the verb tenses are mixed. Have a look at these:

a) http://www.englishpage.com/verbpage/verbs30finaltest.htm 

b) http://www.englishexercises.org/makeagame/viewgame.asp?id=8409

c) http://www.grammarbank.com/verb-tenses-exercise.html 

d) http://www.learnenglishfeelgood.com/mixed-verb-tenses2.html 

e) http://www.english-grammar.at/online_exercises/tenses/all_tenses13.htm

Hope it helps your study!