present perfect simple past simple
just two years ago
ever in 1987
never last month
yet yesterday
since last year at two o'clock
already
up until today
at two o'clock
so far
for the last three hours si b) 2) Have you ever seen a yak?
3)Mark last saw Jennifer three days ago.
4)They already checked in for the flight.
5)How long ago did the bus leave?
6)Have you written your diary yet?
7)I have just heard about the fire.
8)Their plane has landed at 6:45 this morning.
9)We haven't spoken english since we have arrived.
