English grammar

present continous

am/are/is + -ing

things that are happening at the moment of speaking

now, at the moment, at present, today this week/year...

like, believe, hate, know, mean, own, seem, understand, want...

past simple

past simple form

completed actions at a particular point in past

dates, times, yesterday, last..., ...ago

present perfect

have/has + past participle

past actions without fixed time (news) --> just, recentl, lately

actions with result in present 

actions in a period of time --> yet so far, ever, since, for, this week/year

present perfect continous

have/has been + -ing

actions which started in the past and still happening, or recently stopped with result in present

past continous

was/were + -ing

continous actions which are interrupted by a past simple action, description and set the scene when telling a story

past perfect

had + past participle

completed action happened before something else in past

past perfect continous

had been + -ing

continous or repeated action before something else in the past