LET'S REVISE THE USE OF EVER, NEVER, ALREADY, YET, SINCE AND FOR.

We often use EVER, NEVER, JUST, ALREADY, YET, SINCE and FOR with the present perfect tense.

We use EVER in interrogative sentences to express " at any time":
Examples:    
Have you ever been to the United States?
Have you ever traveled by train?
Have you ever failed a class?


We use NEVER in affirmative sentences (but the meaning is negative) to express "at no time".
Examples:
I have never cheated in an exam.
My son has never been to Moscow.
My brother has never travelled to London.

We use JUST to express a recently completed action.
Examples:
The cat has just caught a bird.
The guests have just arrived.
I have just finished my homework.


We use ALREADY to express that something has happened sooner than expected.
Examples:
Don't forget to bring your book! Oh, I have already brought it.
The boys are going to pack, aren't they? No. They have already packed.
Is Adam going to buy a new car? No, he isn't. He has already bought it.


We use YET in interrogative and negative sentences and it suggests a time later than expected.
Examples:
Have you done your homework? No, I haven't done it yet
Has your father seen your report? No, he hasn't seen it yet
Have the visitors arrived? No, they haven't arrived yet.

We use SINCE to express a point in the time.
Examples:
She has lived here since 1980.
Alice has been married since March 2nd.
They have been at the hotel since last Tuesday.

We use FOR to express a period of time.
Examples:
I have worked here for five years.
We have taught at this school for a long time.
They have been at the hotel for a week

Now do this exercise.

Complete the sentences with the Present Perfect of the verbs in brackets and with the correct word (ALREADY, EVER, NEVER, JUST, YET, FOR, SINCE).;

1. We can't eat chips again. We _____________ (have) them three times this week.

2. Better: _________________ (you/clean) the bathroom _________?

    Billy: Yes, I _____________________ (do) it. I did it two hours ago.

3. _______________________ (your sister/ see) the new film _________?

4. Tim _________________ (be) a teacher _______ 1996.

5. Jim is ok. I _____________ (see) him in the street.

6. Your family _____________ (live) in Bogota _______ ten years.

7.  We are going to a concert on Friday but we ______________ (not buy) the tickets ________.

8. They ______________ (fly) in a helicopter. This is the first time.

9. ____________________ (meet) a famous person?

10. My husband ________________ (come) back __________.

11. My sister ______________ (be) to London. She stayed for two weeks.

12. I ________________ (meet) my friends ____________ I started my new job.

13. My mum ________________ (make) a cake so it is still very hot.

14. I _________________ (wait) for you ___________ a long time! You are always late!