This document provides information on how to use the present perfect simple tense in English. It explains that the present perfect simple is used for actions that occurred in the past but the exact time is unknown, or actions that have relevance in the present. It outlines the grammatical rules, including using "have" or "has" as auxiliaries followed by the past participle form of the verb. Examples are given of affirmative, negative, and interrogative sentence structures. Finally, it lists common time expressions that can be used, such as "always," "never," and "before."

1. PRESENT PERFECT SIMPLE
In this presentation you will learn how to use present perfect
simple and you will be able to produce sentence correctly.
This plant has grown five centimeters in
a week.

2. USES
For actions which happened in the past, but the time is not mentioned exactly.
For actions that happened in the past and their results are obvios in the present.
Examples:
Anna has bought a bunch of flowers.
They have made a cake of chocolate.
We have walked around the park. (we are exhausted)
Adelle has washed her car. (It is clean now)

3. GRAMMATICAL RULES
 We form present perfect simple with the auxiliar verb have/ has.
 We use verbs in past participle.
We uses has with We use have with
She I
He You
It They
We
Karime and Rafael have caught the mouse.
Melina has awoken pretty hungry.
Esteban has worked in a international firm.
Irregular verbs
Base form Past simple Past participle
awake awoke awoken
be was/were been
blow blew blown
catch caught caught
The past participle of regular verbs is the same
as the past simple, we only add –ed (work-
worked, save-saved).

4. Grammar structure
Affirmative form
Full form
Subject + have/has + past participle + complement
John has traveled to Ciudad del Cármen.
Short form
John’s traveled to Ciudad del Cármen.
John’s = John has
Negative form
Full form
Subject + have/ has not + past participle +
complement
John has not traveled to Ciudad del Cármen.
Short form
John hasn’t traveled to Ciudad del Cármen
hasn’t = has not
Interrogative form
have/has + past participle + complement + ?
Has John traveled to Ciudad del Cármen?
Full answer
Yes he has
No he has not
Short answer
No he hasn’t

5. TIME EXPRSSIONS
always - ever – never – before – once - twice, etc.
I never travelled by plane.
My female riend always has saved money.
We eaten pizza twice a week.

6. BIBLIOGRAPHY
Murphy. R. (Third edition). (2007). Essential grammar in use. United Kingdom: Cambridge
University Press
Wood ward. (2003). Present perfect tense. Retrieved from:
http://www.grammar.cl/Present/Perfect_Tense.htm
Created by: Arely Balan – Mónica Charles – Isabel Morón – Ruth Salas