Put the correct past tense of the verbs in the following sentences: 1. he (to write) a letter when i ( to see) him. 2. harry (to do) his job while his brothers (to play) games. 3. the man (to fall down) as he (to run) for the bus. 4. we (to sing) a song when george (to come) into the room. 5. while the teacher (to give) a lesson a small dog (to walk) into the room. 6. when the ‘phone bell (to ring) i (to work) in the garden. 7. my hat (to blow) off while i (to cross) the bridge. 8. when the rain (to begin) to fall we (to watch) the game. 9. he (to lose) his pocket book while he (to walk) along the embankment. 10. we (to have) dinner when she (to enter) the restaurant.