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