2. PRESENT PERFECT
The "present perfect" is a time
that is used to describe actions
that just happened in the past
and that have some connection
with this
I have bought a car,
indicates that the action of
buying the car just
performed
In sentences with "present
perfect" is usually not
mention the time that it has
developed action
If instead we used the "simple
past" this connection is lost with
this
I bought a car, It
does not imply that
the action was
recent or still
continue to have
that car
In sentences with
"present perfect" is
usually not mention
the time that it has
developed action
However, sometimes it
can be mentioned the
time period in which the
action has been
developed, but only if
this time has not yet
completed
This morning I have
drunk three coffees, I
use here the "present
perfect" if the period
of the morning is not
over yet.
Because if this
period would
have ended
then it uses the
"past simple"