The Present Perfect Simple Tense

How to form the present perfect

To make the positive present perfect tense, use:

(Also, here's some help if you are not sure how to pronounce '-ed' at the end of a verb).

Positive Positive Short Form
I have played I've played
you have worked you've worked
he has written he's written
she has walked she's walked
it has rained it's rained
we have travelled we've travelled
they have studied they've studied

Try an exercise about the positive form here

The negative is really simple too. Just put 'not' after 'have' or 'has':

Negative Negative Short Form
I have not eaten breakfast today I haven't eaten
you have not been to Asia you haven't been
he has not seen the new film he hasn't seen
she has not played tennis she hasn't played
it has not snowed this winter it hasn't snowed
we have not slept all night we haven't slept
they have not tried the food they haven't tried

Try an exercise about the negative form here

To make a question, put 'have' or 'has' in front of the subject:

'Yes / No' Questions
have I missed the bus?
have you visited London?
has he worked as a waiter before?
has she met John?
has it been cold this week?
have we arrived too early?
have they studied English grammar before?

As you can imagine, for 'wh' questions, we just put the question word before 'have' or 'has':

'Wh' Questions
where have I left my umbrella?
what have you done today?
why has he gone already?
where has she been in the UK?
why has it rained so much this summer?
what have we done?
where have they learned English before?