Necesito todo acerca del present perfect tense ejemplos concepto todo por q necsito hacr una exposicion mediant power point por 20 puntos si quieren x fa ayuda pero esta consulta db estar en ingles : ?

We use the Present Perfect to say that an action happened at an unspecified time before now.

The exact time is not important.

You CANNOT use the Present Perfect with specific time expressions such as : yesterday, one year ago, last week, when I was a child, when I lived in Japan, at that moment, that day, one day, etc.

We CAN use the Present Perfect with unspecific expressions such as : ever, never, once, many times, several times, before, so far, already, yet, etc.

Examples :

Ihave seenthat movie twenty times.

I think Ihave methim once before.

Therehave beenmany earthquakes in California.

Peoplehave traveledto the Moon.

Peoplehave not traveledto Mars.

Haveyoureadthe book yet?

Nobodyhaseverclimbedthat mountain.

A : Hasthere everbeena war in the United States?

B : Yes, therehas beena war in the United States.

How Do You Actually Use the Present Perfect?

The concept of "unspecified time" can be very confusing to English learners.

It is best to associate Present Perfect with the following topics :

TOPIC 1 Experience

You can use the Present Perfect to describe your experience.

It is like saying, "I have the experience of.

" You can also use this tense to say that you have never had a certain experience.

The Present Perfect is NOT used to describe a specific event.

Examples :

Ihave beento France.

This sentence means that you have had the experience of being in France.

Maybe you have been there once, or several times.

Ihave beento France three times.

You can add the number of times at the end of the sentence.

Ihaveneverbeento France.

This sentence means that you have not had the experience of going to France.

I think Ihave seenthat movie before.

Hehasnevertraveledby train.

Joanhas studiedtwo foreign languages.

A : Haveyou evermethim?

B : No, Ihavenotmethim.

TOPIC 2 Change Over Time

We often use the Present Perfect to talk about change that has happened over a period of time.

Examples :

Youhave grownsince the last time I saw you.

The governmenthas becomemore interested in arts education.

Japanesehas becomeone of the most popular courses at the university since the Asian studies program was established.

My Englishhasreallyimprovedsince I moved to Australia.

TOPIC 3 Accomplishments

We often use the Present Perfect to list the accomplishments of individuals and humanity.

You cannot mention a specific time.

Examples :

Manhas walkedon the Moon.

Our sonhas learnedhow to read.

Doctorshave curedmany deadly diseases.

Scientistshave splitthe atom.

TOPIC 4 An Uncompleted Action You Are Expecting

We often use the Present Perfect to say that an action which we expected has not happened.

Using the Present Perfect suggests that we are still waiting for the action to happen.

Examples :

Jameshas not finishedhis homework yet.

Susanhasn't masteredJapanese, but she can communicate.

Billhasstillnot arrived.

The rainhasn't stopped.

TOPIC 5 Multiple Actions at Different Times

We also use the Present Perfect to talk about several different actions which have occurred in the past at different times.

Present Perfect suggests the process is not complete and more actions are possible.

Examples :

The armyhas attackedthat city five times.

Ihave hadfour quizzes and five tests so far this semester.

Wehave hadmany major problems while working on this project.

Shehas talkedto several specialists about her problem, but nobody knows why she is sick.

Here is also a link to a PPT presentation : http : / / www.

Slideshare.

Net / guestbfc1f5 / present - perfect - power - point.