Example: Susan (to fall) fell asleep while she (to do) was doing her homework.
a) When I (to walk) to the office yesterday, I (to meet) John.
b) It (to start) to rain when we (to play) in the garden.
c) When we (to watch) TV last night, Susan (to ring) us
and (to tell) us she (to have) a party at the same time.
d) I (to want) to visit you last night, but you (not to be)
at home. What (you / to do) at about 8 pm?
e) He (to recognize) me, although I (to wear) sunglasses.
f) When the schoolgirl (to cross) the street, a bicycle (to hit) and
(to injure) her.
