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TIME EXPRESSIONS used with 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. |
yet | They have not seen him yet. Have they seen him yet? |
still | They still haven't seen him. |
since | They have not seen him since June. |
for | They have not seen him for 6 months. |
lately / recently | They have not 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 (3rd form of the verb).
Example:
I have just spoken to Carl.
They have already done this task.
Have they ever been to New York?
They have already done this task.
Have they ever been to New York?
She has never seen this movie.
We use the word yet at the end of the negative or interrogative sentences.
They have not finished their project yet .
Have your parents arrived yet ?
Have your parents arrived yet ?
We use the word still before "have / has" in negative sentences.
Example:
I still haven't done it.