Tiempos de verbos en ingles

I worked

I was working

I had already worked

I had been working

PAST PROGRESIVE (was/were+ -ing)
Used with when to express past activity in progress, interrupted by na non-continuosactivity : I was study when you called.
Used with while to express two continuous activities occurring at the same time in past: I was studying while you were writing.

PAST PERFECT
(had +past participle)
Used with by the time/when to express two activities in the past, one occurring before the other. First past perfect/second simple past:
By the time/when we arrived, he hadalready left.

SIMPLE PAST
Yesterday
Last night/week/month/year, etc
The last time
The first time
A day /two weeks/etc. ago
Earlier today/this week/etc.

I work

I am working
I amgoing to work

I have already worked

I have been working

SIMPLE PRESENT
Every day/week/month/year/etc
On Mondays/weekends/etc
Always
Usually
Often
Generally
Sometimes
OccasionallyOnce in a while
Rarely
Seldom
Harly ever
Never

PRESENT PROGRESSIVE
Now
Al this moment
Currently
Temporarily
This week, semester, etc
Today

I will work

I will be working
Iam going to be working

I will already have work

I will have been working

PRESENT PERFECT
Many/a couple/several times
Since last xx/yesterday/1983
In the last/past week/month/etc.
Upto now
So far
Lately
Recently
Already (quests/affirmative)
In a long time (neg)
Yet (neg)
How long(quest)
Ever (quest)

PRESENT PERFECT PROGRESSIVE
All day/morning/week long
Since 3 o’clock/yesterday/etc.
For the last/past 2 days/3 hours/etc
For10 days/2 hours/etc.
How long (quest)

SIMPLE FUTURE
Tomorrow
Tonight
Next week/month/year/etc.
The next time
In a few days/then minutes/a month/etc.