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