PP
do
did-done
They _________ (know) each other since January.
have known
I _______ (see) an alien.
have seen
I _________ (work) hard.
have worked
play
played-played
walk
walked-walked
Charlotte __________ (become) friends with Wilbur.
has become
It ________ (snow) this winter
has not snowed
She _________ (visit) them frequently.
has visited
come
came-come
steal
stole-stolen
I _________ (nor sleep) well since exams started.
have not slept
Where _______ she _______ (be) in the UK?
has / been
She ________ (write) five letters.
has written
choose
chose-chosen
drive
drove-driven
______ you _______ dinner yet?
______ they _______ (study) English grammar before?
Have / studied
Ken ________ (lose) his key.
has lost
ride
rode-ridden
flee
Kate and Tom ________ (tell) me that before.
have told
_____ he just ______ (leave)?
Has / left
School _________ (not start) yet.
has not started
drink
drank-drunk