Now, at the moment, at present , these days, listen! Look! - Present Continuous
Usually, often, never, every week /year/day, from time to time, on Mondays /Tuesdays /Wednesdays/Thursdays /Fridays /Saturdays /Sundays - Present Simple
Last year/week/day, in 2000, from 2002 to 2004, the day before yesterday, last night - Past Simple
Past Continuous - 5 o'clock yesterday, all day long, ...from...till, when, while
Present Perfect - already, yet, just, recently, lately, so far, before
Past Perfect - before, after.
Present Perfect Continuous - all day/night, morning.
Future Simple - tomorrow, next year/day/week, next Monday, in 2018.
Future Continuous - at 5 o'clock tomorrow