94 Last night, I.. (read) in the bed when suddenly I....(hear) a scream

96 I......(NOT/DRIVE) very fast when the accident..(happen)

98 He came when we(discuss).....the game with one another

100 What ...you (do)....when they came?

101 A young man and his wife (drive)......through the countryside in Oxford shire when they saw a girl(stand)...by the road

102 One night I (walk)......along a country road when suddenly I (hear)..............footsteps behind me

`94`was reading - heard

`->`  QKTD : S + was / were + V-ing

`->` QKĐ: S+Ved/2

`->` QKTD, when QKĐ

`96` wasn't driving/happened

`->`  QKTD : S + was / were + V-ing

`->` QKĐ: S+Ved/2

`->` QKTD, when QKĐ

`98`were discussing

`=>` QKTD : S + was / were + V-ing

`100` were you doing

`=>` QKTD: (Wh)+Was/Were +S+V-ing

`101`was driving-standing

`102`was walking/heard

`->`  QKTD : S + was / were + V-ing

`->` QKĐ: S+Ved/2

`->` QKTD, when QKĐ

_____________

qkđ với V thường

`+)` S + Ved/V2

`-)`S + didn’t/did not + V

`?)` Did + (not) + S + V-infinitive

QKTD 

`+)`S + was/were + V-ing

`-)`S + was/were not + V-ing

`?)`(Wh-question) + Was/were + (not) + S + V-ing