Past progressive

PAST PROGRESSIVE
was
were
Ving
s.p.s.
was
were
Ving
s.p.s.
S
P
S
-
P
V
V
not
+
-
Tom was doing his homework at 6 o’clock yesterday.
Tom was not watching TV at 6 o’clock yesterday.
(was not= wasn’t)

PAST PROGRESSIVE
?
Was
Were
V
YES/NO
Общий вопрос
Wh-?
Специальный вопрос
S
Ving
P
s.p.s.
?
was
were
V
S
Ving
P
s.p.s.
?
?
Was Tom doing his homework at 6 o’clock
yesterday?
When was Tom doing his homework yesterday?