Present Perfect + ever, never, yet, just, already

Ever, never:

We often use the present perfect with ever ( it means in your life until now) and never.

Have you even been to Barcelona? / No, I've never been there.


Yet:

Use yet + Present perfect in Negative and Questions sentences to ask if something that you think is going to happen has happened ot to say it hasn't happened. Put yet at the end of the sentence.

Have you finished your work yet? / No, not yet. I haven't finished yet.


Just:

Use just in Positive sentences to say that something happened very recently. Put just before the main verb.

Would you like a coffe? / No thanks. I've just had one.


Already:

Use already in Positive sentences to say that something happened before now or earlier than expected. Put already before the main verb.

Do you want to see this film? / No, I've already seen this four times.