de tot....

TO BE:

http://www.montsemorales.com/gramatica/tobe1.htm

http://www.bradleys-english-school.com/online/MultipleChoice/verbtobe.html

PRESENT:

http://www.isabelperez.com/happy/tenses/present_simple.htm

PASSAT:

http://www.ego4u.com/en/cram-up/grammar/simple-past/exercises?03

http://www.englishexercises.org/makeagame/viewgame.asp?id=2023

FUTUR:

Exercicis:

http://www.ego4u.com/en/cram-up/grammar/future-1-will/exercises

http://www.perfect-english-grammar.com/simple-future-exercise-1.html



THERE IS/THERE ARE:

http://www.englishexercises.org/makeagame/viewgame.asp?id=4933