This document discusses the use of the present perfect tense in English. It explains that the present perfect is used to talk about events that happened at an unspecified time in the past or to describe experiences up to the present. It provides examples of using the present perfect without specific time references like "We have climbed the Eiffel tower" and "I've visited London several times." It also discusses using "never" and "ever" with the present perfect to talk about lack of experience or ask about experience over time.

1. The present perfect

2. Positive sentences

3. When do we use the present perfect?
• To talk about the time when is not specific
He has climbed the Eiffel tower.
( we dont know when)

4. To talk about all the experience up to now.
• Example:
I´ve visited London several times.
We can NOT use time with present perfect.

5. NEVER
• We use NEVER in sentences with the present
perfect to say that you have not had a particular
experience at any time in the past.
Example
We have NEVER travelled to
Australia.

6. EVER
• We use EVER in questions with the present perfect to find
out if something has happened at any time in the past.
Have you ever seen the sky tower ?
No , I´ve never been to New Zealand

7. Past participles
• We form the past participle of regular verbs in the same ways as the past
simpleby adding –ed
• Example :
Walk
Watch
visit
go
Walked
Watched
visited
gone