I can taw you can taw he can taw we can taw you can taw they can taw
V-ing form
I can be tawing you can be tawing he can be tawing we can be tawing you can be tawing they can be tawing
Perfect
I can have tawed you can have tawed he can have tawed we can have tawed you can have tawed they can have tawed
V-ing perfect
I can have been tawing you can have been tawing he can have been tawing we can have been tawing you can have been tawing they can have been tawing
Negation
Simple form
I cannot taw you cannot taw he cannot taw we cannot taw you cannot taw they cannot taw
V-ing form
I cannot be tawing you cannot be tawing he cannot be tawing we cannot be tawing you cannot be tawing they cannot be tawing
Perfect
I cannot have tawed you cannot have tawed he cannot have tawed we cannot have tawed you cannot have tawed they cannot have tawed
V-ing perfect
I cannot have been tawing you cannot have been tawing he cannot have been tawing we cannot have been tawing you cannot have been tawing they cannot have been tawing
Interrogative form
Simple form
can I taw? can you taw? can he taw? can we taw? can you taw? can they taw?
V-ing form
can I be tawing? can you be tawing? can he be tawing? can we be tawing? can you be tawing? can they be tawing?
Perfect
can I have tawed? can you have tawed? can he have tawed? can we have tawed? can you have tawed? can they have tawed?
V-ing perfect
can I have been tawing? can you have been tawing? can he have been tawing? can we have been tawing? can you have been tawing? can they have been tawing?
Interro-negative form
Simple form
can I not taw? can you not taw? can he not taw? can we not taw? can you not taw? can they not taw?
V-ing form
can I not be tawing? can you not be tawing? can he not be tawing? can we not be tawing? can you not be tawing? can they not be tawing?
Perfect
can I not have tawed? can you not have tawed? can he not have tawed? can we not have tawed? can you not have tawed? can they not have tawed?
V-ing perfect
can I not have been tawing? can you not have been tawing? can he not have been tawing? can we not have been tawing? can you not have been tawing? can they not have been tawing?