I could doodle you could doodle she could doodle we could doodle you could doodle they could doodle
V-ing form
I could be doodling you could be doodling she could be doodling we could be doodling you could be doodling they could be doodling
Perfect
I could have doodled you could have doodled she could have doodled we could have doodled you could have doodled they could have doodled
V-ing perfect
I could have been doodling you could have been doodling she could have been doodling we could have been doodling you could have been doodling they could have been doodling
Negation
Simple form
I couldn't doodle you couldn't doodle she couldn't doodle we couldn't doodle you couldn't doodle they couldn't doodle
V-ing form
I couldn't be doodling you couldn't be doodling she couldn't be doodling we couldn't be doodling you couldn't be doodling they couldn't be doodling
Perfect
I couldn't have doodled you couldn't have doodled she couldn't have doodled we couldn't have doodled you couldn't have doodled they couldn't have doodled
V-ing perfect
I couldn't have been doodling you couldn't have been doodling she couldn't have been doodling we couldn't have been doodling you couldn't have been doodling they couldn't have been doodling
Interrogative form
Simple form
could I doodle? could you doodle? could she doodle? could we doodle? could you doodle? could they doodle?
V-ing form
could I be doodling? could you be doodling? could she be doodling? could we be doodling? could you be doodling? could they be doodling?
Perfect
could I have doodled? could you have doodled? could she have doodled? could we have doodled? could you have doodled? could they have doodled?
V-ing perfect
could I have been doodling? could you have been doodling? could she have been doodling? could we have been doodling? could you have been doodling? could they have been doodling?
Interro-negative form
Simple form
couldn't I doodle? couldn't you doodle? couldn't she doodle? couldn't we doodle? couldn't you doodle? couldn't they doodle?
V-ing form
couldn't I be doodling? couldn't you be doodling? couldn't she be doodling? couldn't we be doodling? couldn't you be doodling? couldn't they be doodling?
Perfect
couldn't I have doodled? couldn't you have doodled? couldn't she have doodled? couldn't we have doodled? couldn't you have doodled? couldn't they have doodled?
V-ing perfect
couldn't I have been doodling? couldn't you have been doodling? couldn't she have been doodling? couldn't we have been doodling? couldn't you have been doodling? couldn't they have been doodling?