Look at the picture and compare

http://web2.uvcs.uvic.ca/elc/studyzone/330/grammar/regcom2.htm

Comparative or Superlative 1

http://perso.wanadoo.es/autoenglish/gr.comp.i.htm

List of verbs

http://www.englishpage.com/irregularverbs/interactiveirregularverbs1.htm

Simple Past X Present Perfect

http://www.pacificnet.net/~sperling/quiz/past2.html

Simple Past or Present Perfect?

http://www.pacificnet.net/~sperling/quiz/iverb1.html

Simple Past X past progressive

http://www.pacificnet.net/~sperling/quiz/past1.html

Irregular verbs - T - Z

http://www.clta.on.ca/EAOnline/GrammarCentral/irregular7.html

Irregular verbs - P - S

http://www.clta.on.ca/EAOnline/GrammarCentral/irregular5.html

Irregular verbs - K - M

http://www.clta.on.ca/EAOnline/GrammarCentral/irregular4.html

Irregular verbs - F - H

http://www.clta.on.ca/EAOnline/GrammarCentral/irregular3.html

Irregular verbs - C -E

http://www.clta.on.ca/EAOnline/GrammarCentral/irregular2.html

Irregular verbs - A-B

http://www.clta.on.ca/EAOnline/GrammarCentral/irregular1.html

My first activity

http://www.clta.on.ca/EAOnline/FlashedESL/fe-adjective.html

Past of verb "be"

http://www.clta.on.ca/EAOnline/FlashedESL/fe-pasttobe.html

Past tense of irregular verbs

http://www.clta.on.ca/EAOnline/FlashedESL/fe-pastirregular.html

Correcting

http://www.clta.on.ca/EAOnline/TerribleTeacher/tt-spast.html

Regular verbs

http://www.clta.on.ca/EAOnline/FlashedESL/fe-simplepast.html