The document discusses the present perfect tense in English. It is formed using have/has + past participle. The present perfect is used to talk about life experiences without mentioning a specific time, or actions that began in the past and continue to the present. It can also express duration using time expressions like "for" or "since." The present perfect continuous adds the meaning that an action has been ongoing but may not be finished.

1. PRESENT PERFECT
1. FORM
HAVE /HAS + PAST PARTICIPLE
* - ED (REGULAR VERBS)
I have worked all day
* 3rd
COLUMN( IRREGULAR
VERBS)
I have eaten too much

2. 2. USE
We use the PRESENT PERFECT to talk about life
experiences (things we have done) without mentioning
the time.
I HAVE GONE ON A HOT AIR BALLOON

3. I HAVE FLOWN A PLANE

4. WHEN DID YOU DO IT?
I went on a hot air balloon last spring
I flew a plane two summers ago
IF YOU MENTION THE TIME WHEN YOU DID
SOMETHING, THEN YOU HAVE TO USE
PAST SIMPLE

5. You ALSO use the PRESENT
PERFECT:
To express ACTIONS which STARTED in the
PAST and CONTINUE up to the PRESENT and
are RELEVANT for the present.
Mary and Tim have gone out for two years
Mary and Time have gone out since 2013 (It's
2015 now)

6. The PRESENT PERFECT in this example
expresses DURATION:
Mary and Tim met in the autumn of 2013 and it's
now 2015 so THEY HAVE BEEN TOGETHER
(FOR) ALL THIS TIME!!!!

7. 3. TIME EXPRESSIONS AND
OTHERS:
LIFE EXPERIENCES:
Have you ever climbed
a mountain?
I have NEVER climbed
a mountain
ONCE, TWICE in my
life
DURATION:
How long have you
known John?
FOR (years, months,
hours, days, ages...)
SINCE (2005, last April,
since I was little,
since I was born...)

8. WE USE SOME ADVERBS WITH THE
PRESENT PERFECT:
JUST- I have just eaten (Acabo de...)
ALREADY- I have already eaten (Ya he...)
YET- Have you eaten yet? (¿Ya...?)
I haven't eaten yet (Todavía, aún...)

9. PRESENT PERFECT
CONTINUOUS:
HAVE/ HAS BEEN + - ING
It expresses that something has
been done, but it may not be
finished yet.

10. I have lived in this
house for 10 years (and
today I'm saying
goodbye because I'm
moving out)
I have been living in this
house for 10 years (and
I hope to spend many
more years here!)