I could armor you could armor he could armor we could armor you could armor they could armor
V-ing form
I could be armoring you could be armoring he could be armoring we could be armoring you could be armoring they could be armoring
Perfect
I could have armored you could have armored he could have armored we could have armored you could have armored they could have armored
V-ing perfect
I could have been armoring you could have been armoring he could have been armoring we could have been armoring you could have been armoring they could have been armoring
Negation
Simple form
I couldn't armor you couldn't armor he couldn't armor we couldn't armor you couldn't armor they couldn't armor
V-ing form
I couldn't be armoring you couldn't be armoring he couldn't be armoring we couldn't be armoring you couldn't be armoring they couldn't be armoring
Perfect
I couldn't have armored you couldn't have armored he couldn't have armored we couldn't have armored you couldn't have armored they couldn't have armored
V-ing perfect
I couldn't have been armoring you couldn't have been armoring he couldn't have been armoring we couldn't have been armoring you couldn't have been armoring they couldn't have been armoring
Interrogative form
Simple form
could I armor? could you armor? could he armor? could we armor? could you armor? could they armor?
V-ing form
could I be armoring? could you be armoring? could he be armoring? could we be armoring? could you be armoring? could they be armoring?
Perfect
could I have armored? could you have armored? could he have armored? could we have armored? could you have armored? could they have armored?
V-ing perfect
could I have been armoring? could you have been armoring? could he have been armoring? could we have been armoring? could you have been armoring? could they have been armoring?
Interro-negative form
Simple form
couldn't I armor? couldn't you armor? couldn't he armor? couldn't we armor? couldn't you armor? couldn't they armor?
V-ing form
couldn't I be armoring? couldn't you be armoring? couldn't he be armoring? couldn't we be armoring? couldn't you be armoring? couldn't they be armoring?
Perfect
couldn't I have armored? couldn't you have armored? couldn't he have armored? couldn't we have armored? couldn't you have armored? couldn't they have armored?
V-ing perfect
couldn't I have been armoring? couldn't you have been armoring? couldn't he have been armoring? couldn't we have been armoring? couldn't you have been armoring? couldn't they have been armoring?