THE PERFECT POST

As diferenças entre o Present Perfect, Present Perfect Continuous, Past Perfect e Future Perfect:

PERFECT TENSE	USE	STRUCTURE	EXAMPLE
PRESENT PERFECT	AN ACTION IN THE PAST	HAVE/HAS + PAST PARTICIPLE	I HAVE SEEN IT
PRESENT PERFECT CONTINUOUS	AN ACTION THAT HAS STARTED IN THE PAST AND IT’S STILL HAPPENNING	HAVE/HAS + BEEN + VERB (ING)	I HAVE BEEN SEEING IT
PAST PERFECT	AN ACTION THAT HAPPENED BEFORE ANOTHER ACTION	HAD + PAST PARTICIPLE	I HAD SEEN IT
FUTURE PERFECT	AN ACTION THAT WILL BE COMPLETED IN THE FUTURE	WILL + HAVE + PAST PARTICIPLE	I WILL HAVE SEEN IT