I could dawn you could dawn she could dawn we could dawn you could dawn they could dawn
V-ing form
I could be dawning you could be dawning she could be dawning we could be dawning you could be dawning they could be dawning
Perfect
I could have dawned you could have dawned she could have dawned we could have dawned you could have dawned they could have dawned
V-ing perfect
I could have been dawning you could have been dawning she could have been dawning we could have been dawning you could have been dawning they could have been dawning
Negation
Simple form
I could not dawn you could not dawn she could not dawn we could not dawn you could not dawn they could not dawn
V-ing form
I could not be dawning you could not be dawning she could not be dawning we could not be dawning you could not be dawning they could not be dawning
Perfect
I could not have dawned you could not have dawned she could not have dawned we could not have dawned you could not have dawned they could not have dawned
V-ing perfect
I could not have been dawning you could not have been dawning she could not have been dawning we could not have been dawning you could not have been dawning they could not have been dawning
Interrogative form
Simple form
could I dawn? could you dawn? could she dawn? could we dawn? could you dawn? could they dawn?
V-ing form
could I be dawning? could you be dawning? could she be dawning? could we be dawning? could you be dawning? could they be dawning?
Perfect
could I have dawned? could you have dawned? could she have dawned? could we have dawned? could you have dawned? could they have dawned?
V-ing perfect
could I have been dawning? could you have been dawning? could she have been dawning? could we have been dawning? could you have been dawning? could they have been dawning?
Interro-negative form
Simple form
could I not dawn? could you not dawn? could she not dawn? could we not dawn? could you not dawn? could they not dawn?
V-ing form
could I not be dawning? could you not be dawning? could she not be dawning? could we not be dawning? could you not be dawning? could they not be dawning?
Perfect
could I not have dawned? could you not have dawned? could she not have dawned? could we not have dawned? could you not have dawned? could they not have dawned?
V-ing perfect
could I not have been dawning? could you not have been dawning? could she not have been dawning? could we not have been dawning? could you not have been dawning? could they not have been dawning?