1. letters sent (everyday, now, every week)
2. letters sent (yesterday, today, before you come)
3. letters sent (when i came, yesterday at this time)
4. letters will be sent ( tomorrow, before you come)
He has been taking his exam for half an hour already.
they have been playing volleyball since 2 o'clock.
He has taken, He has been taking, He will have been taking, He had taken.
They have played, They have been playing, They will have been taking, they had taken
kajetsya tak
Goes
doesn't go
singing
watching
Is ... not going
Is ... listening to
won
were
didn't start
is breaking
hasn't wrote
lived
were
like... was
have wrote
Путешествия(2). Очень много текста