I could parbuckle you could parbuckle he could parbuckle we could parbuckle you could parbuckle they could parbuckle
V-ing form
I could be parbuckling you could be parbuckling he could be parbuckling we could be parbuckling you could be parbuckling they could be parbuckling
Perfect
I could have parbuckled you could have parbuckled he could have parbuckled we could have parbuckled you could have parbuckled they could have parbuckled
V-ing perfect
I could have been parbuckling you could have been parbuckling he could have been parbuckling we could have been parbuckling you could have been parbuckling they could have been parbuckling
Negation
Simple form
I could not parbuckle you could not parbuckle he could not parbuckle we could not parbuckle you could not parbuckle they could not parbuckle
V-ing form
I could not be parbuckling you could not be parbuckling he could not be parbuckling we could not be parbuckling you could not be parbuckling they could not be parbuckling
Perfect
I could not have parbuckled you could not have parbuckled he could not have parbuckled we could not have parbuckled you could not have parbuckled they could not have parbuckled
V-ing perfect
I could not have been parbuckling you could not have been parbuckling he could not have been parbuckling we could not have been parbuckling you could not have been parbuckling they could not have been parbuckling
Interrogative form
Simple form
could I parbuckle? could you parbuckle? could he parbuckle? could we parbuckle? could you parbuckle? could they parbuckle?
V-ing form
could I be parbuckling? could you be parbuckling? could he be parbuckling? could we be parbuckling? could you be parbuckling? could they be parbuckling?
Perfect
could I have parbuckled? could you have parbuckled? could he have parbuckled? could we have parbuckled? could you have parbuckled? could they have parbuckled?
V-ing perfect
could I have been parbuckling? could you have been parbuckling? could he have been parbuckling? could we have been parbuckling? could you have been parbuckling? could they have been parbuckling?
Interro-negative form
Simple form
could I not parbuckle? could you not parbuckle? could he not parbuckle? could we not parbuckle? could you not parbuckle? could they not parbuckle?
V-ing form
could I not be parbuckling? could you not be parbuckling? could he not be parbuckling? could we not be parbuckling? could you not be parbuckling? could they not be parbuckling?
Perfect
could I not have parbuckled? could you not have parbuckled? could he not have parbuckled? could we not have parbuckled? could you not have parbuckled? could they not have parbuckled?
V-ing perfect
could I not have been parbuckling? could you not have been parbuckling? could he not have been parbuckling? could we not have been parbuckling? could you not have been parbuckling? could they not have been parbuckling?