TIME EXPRESSIONS used with the Present Perfect:
|just||They have just seen him.|
|already||They have already seen him.|
|ever||Have they ever seen him?|
|never||They have never seen him.|
They haven’t seen him yet.
Have they seen him yet?
|still||They still haven’t seen him.|
|since||They haven’t seen him since June.|
|for||They haven’t seen him for 6 months.|
They haven’t seen him lately/recently.
|this morning (this week, today...)||They have seen him this morning.|
|once (twice, three times,...)||They have seen him three times.|
|so far (up to now)||They haven’t seen him so far.|
|How much (How many)||How many times have they seen him?|
|How long||How long have they seen him?|
|before||They have seen him before.|
- We usually use the words just/already/ever/never before the past participle (the 3rd form of the verb):
I have just spoken to Carl.
They have already done this task.
Havethey ever been to New York?
She has never seen this film.
- We use the word yet at the end of the negative or interrogative sentences.
They haven’t finished their project yet.
Have your parents arrived yet?
- We use the word still before "have/has" in negative sentences.
I still haven’t done it.