General Information

past simple vs Past Continuous

Past simple vs Present Perfect

Past simple vs Past Perfect
explanation + exercises

Present Perfect vs Present Perfect Continuous

Past perfect continuous explanation + exercise

past perfect simple vs past perfect continuous exercise

past perfect vs past perfect continuous exercise

explanation on Past Perfect simple vs Past Perfect Continuous

past perfect continuous exercise

Past perfect continuous , past simple exercise

past perfect simple + past perfect continuous
explanation + exercise

all tenses mixed

verb patterns

State verbs list

State verbs list

Some more exercises on verb forms.doc

Reported speech (explained)

Reported speech (exercises)

grammar exercises
exercises grammmar: question tags and tag questions