I used to drink milk but now i don't like it
i used to play toy when i was a kid
i used to go to children garden but now i go to school
i used to live in Moscow but now i live in London
i used to be Sonia's friend but now i don't because she moved to another country
-для обозначения точного времени
we'll meet at 4 o'clock
-выражения:at night,at sunset,at home,at all,not at all,at first,at last etc
-для обозначения мест
at the bus stop
-для обозначения места в здании
I think that this is realy great when two people frindd
A) -, a, anb)-, a, a, an, a, an, -, -