The English Tenses

As in every language, there are present a variety of tenses to differentiate the time which it expresses. English is not an exception, this language counts with 12 tenses, which will be shown next below: 

PRESENT TENSE	POSITIVE	NEGATIVE
PRESENT SIMPLE	I PLAY	I DON’T PLAY
PRESENT CONTINUOUS	I AM PLAYING	I AM NOT PLAYING
PRESENT PERFECT	I HAVE PLAYED	I HAVEN’T PLAYED
PRESENT PERFECT CONTINUOUS	I HAVE BEEN PLAYING	I HAVEN’T BEEN PLAYING

PAST TENSE	POSITIVE	NEGATIVE
PAST SIMPLE	I PLAYED	I DIDN’T PLAY
PAST CONTINUOUS	I WAS PLAYING	I WAS NOT PLAYING
PAST PERFECT	I HAD PLAYED	I HADN’T PLAYED
PAST PERFECT CONTINUOUS	I HAD BEEN PLAYING	I HADN’T BEEN PLAYING

FUTURE TENSE	POSITIVE	NEGATIVE
FUTURE SIMPLE	I WILL PLAY	I WON’T PLAY
FUTURE CONTINUOUS	I WILL BE PLAYING	I WON’T BE PLAYING
FUTURE PERFECT	I WILL HAVE PLAYED	I WON’T HAVE PLAYED
FUTURE PERFECT CONTINUOUS	I WILL HAVE BEEN PLAYING	I WON’T HAVE BEEN PLAYING

To do: What is each tense used for?