By the time he arrives, I (clean) for an hour.
will have been cleaning
They are dancing because they (just hear) their favourite song.
have just heard
(Have you travelled / Did you travel) abroad many times?
Have you travelled
By this time next year, we (be) friends for a decade.
will have been
I (watch) two episodes of the series.
have watched
lBy the time you go to Europe, the package (arrive).
will have arrived
By this time tomorrow, I (exercise) for 30 minutes.
will have been exercising
They (arrived / have arrived) a week ago.
arrived
She (read) that book for two hours.
has been reading
I can go out now because I (finish) my work.
have finished
She (swim) in the pool for the past hour.
has been swimming
I need a plaster because I (cut) my finger.
have cut
Our neighbour (was / has been) in hospital since Friday.
has been
They (sleep) for nine hours by 8:00 am tomorrow.
will have been sleeping
They (didn’t recognise / haven’t recognised) me at yesterday’s meeting.
didn't recognise
We (have worked / worked) here for three years.
have worked
By the time my teacher quizzes us tomorrow, I (memorize) all the words.
will have memorized
I’m really hungry. I (haven’t eaten / didn’t eat) yet.
haven't eaten