We use the present perfiect(he has washed / they have gone, etc.) for an action in the past with a result now.
ex)
I've lost my passport. (= I can't find my passport now)
He has washed his car. (= his car is clean now)
Usually you can also use the simple pas(he washed / I lost, etc.) in these situations. So you can say:
"Where's your key?" "I've lost it." or "I lost it."
"Is Peter here?" "No, he's gone home." or "He went home."
We've bought a new car. or We bought a new car.
We use only the simple past(not the present perfect) with a finished time(yesterday, last week, etc.).
ex)
I lost my key yesterday. (not I have lost)
We bought a new car last week.(not we have bought)
(in Basic Grammer in use)
ex)
I've lost my passport. (= I can't find my passport now)
He has washed his car. (= his car is clean now)
Usually you can also use the simple pas(he washed / I lost, etc.) in these situations. So you can say:
"Where's your key?" "I've lost it." or "I lost it."
"Is Peter here?" "No, he's gone home." or "He went home."
We've bought a new car. or We bought a new car.
We use only the simple past(not the present perfect) with a finished time(yesterday, last week, etc.).
ex)
I lost my key yesterday. (not I have lost)
We bought a new car last week.(not we have bought)
(in Basic Grammer in use)
