Present Perfect Simple


The Present Perfect Simple is used to express an action which continues to the present, to express an experience, to express a result and it has just finished.

          I. FORM
          Positive 
Subject + have / has + Past Participle + ...
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I, We, You, They have worked in a car factory.
He, She, It has worked in a car factory.
          Negative 
Subject + have / has + not + Past Participle + ...
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I, We, You, They have not worked in a car factory.
He, She, It has not worked in a car factory.
          Question
Have / Has + Subject + Past Participle + ...?
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Have I, we, you, they worked in a car factory.?
Has he, she, it worked in a car factory.?
          II. USE
          1. To express an action which continues to the present.
                    - You have lived in Phnom Penh.
                    - They have made Coca-Cola in Cambodia.
                    - They have studied English.

          2. To express an experience.
                    - Have you ever traveled by plane?     - Yes, I have.
                    - I have ever traveled by ship.
                    - I have ever been to Angkor Wat.

          3. To express a result and it has just finished.
                    - The plane has just taken off.
                    - He has just woken up.
                    - They have just had a meal.


The Present Perfect Simple : For, Since, Just, Already, Yet

          1. We can use the Present Perfect Simple  with "for" and "since", to talk about situations or actions in a period of time from the past until now. We use "for" with a period of time (e.g. three months), and "since" with a time (e.g. Tuesday).

                    - We've lived here for six months.


Present Perfect Simple (for-since)

                    - I have not seen Tom since Tuesday.

Present Perfect Simple (for-since 1)


          2. We use "just" with the Present Perfect Simple to talk about things that happened a short time before now.

Present Perfect Simple (just)
                    - Could I speak to Jane, please?    I'm afraid she has just left. 
                    - Is that a good book?  I don't know. I have just started it.


          3. We use "already" with the Present Perfect Simple to emphasize that something happened before now, or before it was expected to happen.

Present Perfect Simple (already)
                    - Do you want something to eat?  No, thanks, I have already eaten.

          4. We use "yet" with a negative verb to say that something has not happened, but we think that it will happen.
                    - The post has not arrived yet.
                    - Has it stopped raining yet?

Notice that we usually put "yet" as the end of a negative or question statement.

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The Passive : A verb in the Passive Voice when its form shows that something is done to the person or
The Use Of The Passive : An intransitive verb (a verb without object) cannot be passive.
The Agent In The Passive : When we need to mention the agent in a passive sentence, we use a phrase
The Passive With "GET" : We sometimes form the passive with 'get' rather than with 'be'

Past Simple : talk about something that happened at a particular time in the past, for
Past Continuous : is used to express an activity happening over a period of time in the past.
Past Perfect Simple : is used for something that happened before something else in the past,
Past Perfect Continuous : is used for an action that began before a certain point in the past