Grammar exersices (Isma)

Exersices of first conditional (If+present,will+infinitive)

http://www.perfect-english-grammar.com/first-conditional-exercise-1.html

Exersices of second conditional (if+past,would+infinive)

http://www.perfect-english-grammar.com/second-conditional-exercise-1.html

Exersices of possibility (may/might+infinive)

http://www.englishexercises.org/makeagame/viewgame.asp?id=6197

Exersices of advice (should/shouldn´t)

http://www.englishexercises.org/makeagame/viewgame.asp?id=1734