Tenses : Basic English

	Past	Present	Future
Simple	Simple Past	Simple Present	Simple Future
	yesterday last year/ month/ etc. before  for five weeks/days/etc. one year/ month ago	every morning / day / etc. always usually frequently sometimes	tomorrow tonight next week/month/etc. soon in the future
Progressive	Past Progressive	Present Progressive	Future progressive
	while when	now right now this week/minute/etc.	when after as soon as before
Perfect	Past Perfect	Present Perfect	Future Perfect
	before already by the time until then/last week/etc. after	until now since ever never many times/ weeks/years/etc. for three hours/ minutes/etc/	by the time you go (somewhere) by the time you do (something) already
Perfect Progressive	Past Perfect progressive	Present Perfect Progressive	Future Perfect Progressive
	before for one week/hour/etc. since	for the past year/ month/ etc. for the last 2 months/ weeks/etc. up to now for 6 weeks/hours/etc. since	by the time for ten days/weeks/etc. by

Source: http://www.athabascau.ca/courses/engl/155/support/verb_tenses.htm