My son is 3 years old and this afternoon I experienced a good example of what it’s like to acquire language.
My son speaks better French than English for the moment and he was doing a magic trick with his grandparents.
His grandma said (about the ball) whilst taking away the ball and putting it behind her back : It’s gone forever.
Now I’m sure my son knows the word gone but not forever.
He straightaway knew what it meant and said “C’est partir pour toujours!” – It’s gone forever – in French.
He associated the words with an action.
Now, verbs are actions “put on your shoes, take off your shoes, etc.” and I’m convinced that it’s (partly) in this way that children learn language.