Present Perfect Tense

The present perfect tense:

This page will present the present perfect simple:

·         its form
·         and its use.

I.       The form of the present perfect simple tense:


Have (in the simple present) + Verb (in the past participle form)


Positive
Negative
Interrogative

I have worked.
I have not worked.
Have you worked?

Examples:

·         Have you finished the job?
·         No, I haven't finished yet.
·         Yes, I have already finished.
·         She's just finished her job.

Infinitive
Simple past
Past participle
be
come
go
do
meet
was/were
came
went
did
met
been
come
gone
done
met

 
II.    The uses of the present perfect simple tense:

1.      To emphasize on the result of a past action without mentioning the actual time when it happened:

Examples:

            ·         I have met that girl before.
            ·         We have discussed this issue a few times.

2.      Action performed in a period that has not finished yet (the same day, week, month, etc.):

Examples:

            ·         Have you seen Lacy today? (The day is not over yet.)
            ·         I have had several tests this month. (The month has not finished
                  yet.)

3.      Action that started in the past and has continued until now. Often used with since (indicating the beginning of action) or for (indicating the duration of action):

Examples:

            ·         They have lived here for ten years.
            ·         I have not seen her since we left high school.
            ·         Clare and John have known each other since they were at primary
                  school.

4.      It is used to indicate completed activities in the immediate past (with just).

Example:

"He has just taken the medicine."


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