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