tiempos

often, always, every day...

present simple

keywords

sheldom, whenever

on Mondays, Tuesdays

uses

form

afirmative:
subject+verb
I talk
He eats

negative:
subject+don't/doesn't+verb
I don't talk
He doesn't eat

questions:
do/does+subject+verb
Do you eat?
Does he walk?

habits, facts, thoughts and feelings

general statements and actions

scientific facts

programmed events

present continuous

keywords

now, at the moment

lately, currently

form

afirmative:
subject+to be+verb in -ing
I am talking

negative:
subject+to be+not+verb in -ing
I am not talking

questions:
to be+subject+verb in -ing
are you talking?
is he eating?

uses

talk about something that´s
happening now

talk about something that
happens nowadays

near future

present perfect

uses

action that happens in the past
and continues in present

repetitive action in a period of time

actions in an inespecific period of time

form

afirmative:
subject+to have+p. participe
I've walked
He has eaten

negative:
subject+to have+ not+p.participe
I haven't walked
He hasn't eaten

questions:
to have+subject+p. participe
Have you walked?
Has he eaten?

keywords

just, ever, never, already, yet

for, since

past simple

keywords

yesterday, last night...

in 2010, 1973..

form

afirmative:
subject+verb -ed/inf. form
I asked her to stop
she walked through bullets and haze

negative:
subject+to do/to be+not+verb in infinitive
I didn't ask her to stop
She doesn't walk through bullets and haze

questions:
to be/to do+subject+verb in infinitive
Did I ask her to stop?
Does she walk through bullets and haze?

uses

actions that happened in the past

serie of events in the past

repetitive actions in the past

past continuous

form

afirmative:
subject+to be+verb -ing
I was talking
They were eating

negative:
subject+to be+not+verb -ing
I wasn't talking
They weren't eating

questions:
to be+subject+verb -ing
Were you eating?
was he talking?

keywords

while

when

uses

actions being developed in the
past when other interrupts

actions in an especific
period of time

be going to

form

afirmative:
subject+to be+going+infinitive
He's going to jog

negative:
subject+to be+not+going+infinitive
He's not going to come

questions:
to be+subject+going+infinitive
is she going to die?

keywords

tomorrow, next week, in X days...

uses

future events with a solid link
with the present

plans and intentions

predictions

future simple

form

afirmative:
sujeto+will+verb
I'll call you tonight

negative:
subject+won't+verb
I won't call you tonight

questions:
will+subject+verb
will you call me tonight?

keywords

tonight, next week, in X days...

uses

voluntary actions

promises

predictions