Present simple, Past simple, Future simple >> facts, truths, habits
Present continuous >> ongoing process
Past continuous >> process, now completion
Future continuous >> will be ongoing
Present perfect >> result
Past perfect >> action completed in the past
Future perfect >> action completed in the future
Present perfect continuous >> progress towards an outcome
Past perfect continuous >> ongoing process in the past, almost complete
Future perfect continuous >> process in the future, leading to an outcome/ end point
#From Grammar school