1, was watching
2, started/ were playing
3, was sitting
4, was playing/ was reading
5, was sleeping/ came
6, rang/ were playing
7, was cooking/ was watering
8, was driving/ saw
9, was doing
10, were watching
11, were going/ rained
12, were you watching/ phoned
13, came/ was having
14, saw/ was wearing
15, broke/ were playing
16, was waiting/ arrived
17, were having lunch/ rang
18, was having/ rang
19, didn't go
20, did you do
21, arrived/ wass still sleeping
22, was watering/ was chatting
23, were crossing/ saw
24, was ringing/ was taking
25, heard/ was opening
_____________
$S+was/were+V-ing$
$S+V-ed/V_quy-tắc$
