I have done (present perfect) and I did (past)

Question 1

Do NOT use the present perfect (have arrived / have done / have been etc.) with:

Answer 1

a FINISHED TIME. We use the PAST.

,,,I saw Paula yesterday.
(not I have seen)

,,,Where were you on Sunday afternoon?
(not Where have you been)

…I have lost my key.
(= I can’t find it now)
#
I lost my key last week

…We’ve lived in Singapore for six years.
(= we live there now)
#
…We lived in Glasgow for six years, but
now we live in Singapore.

Question 2

With a finished time (yesterday / last week etc.):

Answer 2

we use the past (arrived/saw/was etc.)

…We arrived yesterday/last week/at 3 o’clock/in 2002/six months ago