1.I a letter while she a book. (WRITE, READ)

wrote, read
was writing, read
wrote, was reading
was writing, was reading
2.When I at them, they at me. (LOOK, SMILE)

looked, were smiling
was looking, smiled
looked, smiled
were looking, were smiling
3.What (you) in the evening yesterday? (DO)

was you doing
did you did
did you do
were you doing
4.What (you) the whole evening yesterday? (DO)

did you did
were you doing
was you doing
did you do
5.This time yesterday I at the theatre. (SIT)

was sitting
sat
was siting
were sitting
6.I to school when I him. (GO, SEE)

went, saw
was going, saw
went, was seeing
was going, was seeing
7.The train at 9.45. (START)

started
was starting
starts
were starting
8.The boy with a knife when he his finger. (PLAY, CUT)

was playing, was cutting
were playing, cut
was playing, cut
played, was cutting
9.He a report when I the classroom. (MAKE, LEAVE)

was making, left
were making, left
made, was leaving
made, left
10.This time yesterday we dinner. (HAVE)

haved
had
was having
were having