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