This document discusses the present perfect tense in English. It explains that the present perfect uses the verb "have" plus the past participle of the main verb. It provides examples of affirmative, interrogative, and negative sentences in the present perfect tense. It also notes that regular verbs form the past participle with "-ed", while irregular verbs have unique past participle forms that can be found in a list of irregular verbs.

1. HAVE / HAS + PAST PARTICIPLE
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2. The Present Perfect
He HAS just FOUND A four-leaf clover.
THE PRESENT PERFECT

3. Form of the Present Perfect
I
You
We
They
Positive
have +
past participle
Negative
have not
(haven´t) +
past participle
Question
Have +
Subject + past
participle
He
She
It
has +
past participle
has not
(hasn´t) +
past participle
Has+
Subject + past
participle

4. EXAMPLES
AFFIRMATIVE:
He has bought a skateboard.
 INTERROGATIVE:
Has Bart bought a bike?
 NEGATIVE:
He hasn´t bought a bike,
he has bought a skateboard,

5. PAST PARTICIPLE
REGULAR VERBS: -ED
He has finishED.
IRREGULAR VERBS : past participle
(see LIST OF IRREGULAR VERBS , 3rd
column).
They have EATEN
IRREGULAR VERBS : past participle
(see LIST OF IRREGULAR VERBS , 3rd
column).
They have EATEN

6. PAST PARTICIPLE
REGULAR VERBS: -ED
He has finishED.
IRREGULAR VERBS : past participle
(see LIST OF IRREGULAR VERBS , 3rd
column).
They have EATEN
IRREGULAR VERBS : past participle
(see LIST OF IRREGULAR VERBS , 3rd
column).
They have EATEN