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 could not ramp you could not ramp he could not ramp we could not ramp you could not ramp they could not ramp
V-ing form
I could not be ramping you could not be ramping he could not be ramping we could not be ramping you could not be ramping they could not be ramping
Perfect
I could not have ramped you could not have ramped he could not have ramped we could not have ramped you could not have ramped they could not have ramped
V-ing perfect
I could not have been ramping you could not have been ramping he could not have been ramping we could not have been ramping you could not have been ramping they could not 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
could I not ramp? could you not ramp? could he not ramp? could we not ramp? could you not ramp? could they not ramp?
V-ing form
could I not be ramping? could you not be ramping? could he not be ramping? could we not be ramping? could you not be ramping? could they not be ramping?
Perfect
could I not have ramped? could you not have ramped? could he not have ramped? could we not have ramped? could you not have ramped? could they not have ramped?
V-ing perfect
could I not have been ramping? could you not have been ramping? could he not have been ramping? could we not have been ramping? could you not have been ramping? could they not have been ramping?