Change the adjectives into adverbs

http://www.manythings.org/fq/1/8993.html

Present X Past X Future

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

Simple Past X Present Perfect

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

Past Simple or Present Perfect?

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

Simple Past X past progressive

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

Slang

http://www.eslcafe.com/slang/list.html

Irregular Plurals

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

Plural for nouns ending in "f"

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

Plurals for nouns ending in "o"

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

Plural

http://www.clta.on.ca/EAOnline/GrammarCentral/moreplural2.html

Adverb or Adjective ?

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

Relative Pronoun

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

Adverbs

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

Plural

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

Simple Past - correcting

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

American X British English

1. http://www.clta.on.ca/EAOnline/CrazyEnglish/ukus-vocabI.html

2. http://www.clta.on.ca/EAOnline/CrazyEnglish/ukus-vocabII.html

3. http://www.clta.on.ca/EAOnline/CrazyEnglish/ukus-vocabIII.html

4. http://www.clta.on.ca/EAOnline/CrazyEnglish/ukus-vocabIV.html

5. http://www.clta.on.ca/EAOnline/CrazyEnglish/ukus-vocabV.html

6. http://www.clta.on.ca/EAOnline/CrazyEnglish/ukus-spellingI.html

Active or Passive voice

http://a4esl.org/q/h/vm/active-passive.html

Simple past X Past continuous

http://a4esl.org/q/h/vm/pastpastcont.html