+ Ved/V2

? Did + V

- didn't +V

+ V/V -s/-es

? Do/Does +V

- don't/doesn't +V

+ will+V

? Will + V

- will not/won't+V

yesterday

last week

a year ago

in 1999

usually, always, often, 

every morning,

seldom, sometimes, never,

once/twice a week,

rarely, hardly ever,

tomorrow,

next month,

in 2028,

in three weeks,

in a couple of days,

+ was/were+Ving

? Was/Were+Ving

- was/weren't+Ving

+ am/is/are+Ving

? Am/Is/Are+Ving

- am/is/aren't+Ving

+ will be+Ving

? Will be+Ving

- will not/won't be+Ving

at 5 p.m. yesterday,

at that moment,

while, when,

all the time,

all day (long),

for 3 hours yesterday,

the whole evening,

on Monday last week,

during the war

now, at the moment, 

at this moment, 

at present, while,

when, today, tonight,

nowadays, these days,

still, from 3 till 4

at 3 p.m.tomorrow,

 next month,

in a couple of days,

from 6 till 7,

+ had+Ved/3

? Had+Ved/3

- hadn't+Ved/3

+ have/has+Ved/3

? Have/Has+Ved/3

- Have/Hasn't+Ved/3

+ will have+Ved/3

? Will have be+Ved/3

- won't have+Ved/3

by 5 p.m. yesterday,

before he came,

by the end of the last

year,

since, already, just,

yet, ever, never,

this week, today, by now,

lately/recently, for,

always, often, 

for the first/second time

when he comes,

by 3 p.m. tomorrow

by next summer,

by Monday,

Past Perfect

Continuous

Present Perfect

Continuous

Future Perfect

Continuous

+ had been+Ving

? Had been+Ving

- hadn't been+Ving

+ have/has been+Ving

? Have/Has been+Ving

- Have/Hasn't been+Ving

+ will have been+Ving

? Will have been+Ving

- won't have been+Ving

for 2 hours, when... 

since morning,

since he came,

still, how long,

for 3 hours (already),

for