VERB TENSES

PRESENT	PAST	PAST PARTICIPLE
study	studied	studied
be	was / were	been
have	had	had

VERB TENSE	EXAMPLE
IMPERATIVE	Study English, please.
PRESENT SIMPLE	I study English twice a week.
PRESENT CONTINUOUS	I'm studying English at the Adult Center. I'm going to study English.
PRESENT PERFECT	I have studied English for many years.
PRESENT PERFECT CONTINUOUS	I have been studying English for many years.
PAST SIMPLE	I studied English at school.
PAST CONTINUOUS	I was studying English when the phone rang.
PAST PERFECT	I had studied English before moving abroad.
PAST PERFECT CONTINUOUS	I had been studying English during my childhood.
FUTURE	I will study English in the future.
FUTURE PERFECT	By 2015 I will have studied English for 3 years.
FUTURE PERFECT CONTINUOUS	By 2015 I will have been studying English for 3 years.
CONDITIONAL	I would study English if I had some more time.
CONDITIONAL PERFECT	I would have studied English if I had been there.
CONDITIONAL PERFECT CONTINUOUS	I would have been studying English during all my life, but nowadays it's not possible for me.
VERBAL PERIPHRASIS	EXAMPLE
HAVE TO	I have to study English.
HAD TO	I had to study English last year.
USE TO	I use to study English in the evenings.
USED TO	I used to study English when I was young.

Here you will find ANOTHER VERBS TENSE REVISION CHART.

AND HERE ANOTHER ONE.

Choose whatever you want, the question is to get familiar with them.

And if you need to reinforce some of the tenses at a basic level,

revise this website

or this other one.