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