I can stab you can stab he can stab we can stab you can stab they can stab
V-ing form
I can be stabbing you can be stabbing he can be stabbing we can be stabbing you can be stabbing they can be stabbing
Perfect
I can have stabbed you can have stabbed he can have stabbed we can have stabbed you can have stabbed they can have stabbed
V-ing perfect
I can have been stabbing you can have been stabbing he can have been stabbing we can have been stabbing you can have been stabbing they can have been stabbing
Negation
Simple form
I can't stab you can't stab he can't stab we can't stab you can't stab they can't stab
V-ing form
I can't be stabbing you can't be stabbing he can't be stabbing we can't be stabbing you can't be stabbing they can't be stabbing
Perfect
I can't have stabbed you can't have stabbed he can't have stabbed we can't have stabbed you can't have stabbed they can't have stabbed
V-ing perfect
I can't have been stabbing you can't have been stabbing he can't have been stabbing we can't have been stabbing you can't have been stabbing they can't have been stabbing
Interrogative form
Simple form
can I stab? can you stab? can he stab? can we stab? can you stab? can they stab?
V-ing form
can I be stabbing? can you be stabbing? can he be stabbing? can we be stabbing? can you be stabbing? can they be stabbing?
Perfect
can I have stabbed? can you have stabbed? can he have stabbed? can we have stabbed? can you have stabbed? can they have stabbed?
V-ing perfect
can I have been stabbing? can you have been stabbing? can he have been stabbing? can we have been stabbing? can you have been stabbing? can they have been stabbing?
Interro-negative form
Simple form
can't I stab? can't you stab? can't he stab? can't we stab? can't you stab? can't they stab?
V-ing form
can't I be stabbing? can't you be stabbing? can't he be stabbing? can't we be stabbing? can't you be stabbing? can't they be stabbing?
Perfect
can't I have stabbed? can't you have stabbed? can't he have stabbed? can't we have stabbed? can't you have stabbed? can't they have stabbed?
V-ing perfect
can't I have been stabbing? can't you have been stabbing? can't he have been stabbing? can't we have been stabbing? can't you have been stabbing? can't they have been stabbing?