English verb conjugation
COULD PARBUCKLE

Regular verb: parbuckle - parbuckled - parbuckled

Affirmation

Simple form	V-ing form
I could parbuckle you could parbuckle he could parbuckle we could parbuckle you could parbuckle they could parbuckle	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	V-ing 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	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	V-ing form
I couldn't parbuckle you couldn't parbuckle he couldn't parbuckle we couldn't parbuckle you couldn't parbuckle they couldn't parbuckle	I couldn't be parbuckling you couldn't be parbuckling he couldn't be parbuckling we couldn't be parbuckling you couldn't be parbuckling they couldn't be parbuckling
Perfect	V-ing perfect
I couldn't have parbuckled you couldn't have parbuckled he couldn't have parbuckled we couldn't have parbuckled you couldn't have parbuckled they couldn't have parbuckled	I couldn't have been parbuckling you couldn't have been parbuckling he couldn't have been parbuckling we couldn't have been parbuckling you couldn't have been parbuckling they couldn't have been parbuckling

Interrogative form

Simple form	V-ing form
could I parbuckle? could you parbuckle? could he parbuckle? could we parbuckle? could you parbuckle? could they parbuckle?	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	V-ing 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?	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	V-ing form
couldn't I parbuckle? couldn't you parbuckle? couldn't he parbuckle? couldn't we parbuckle? couldn't you parbuckle? couldn't they parbuckle?	couldn't I be parbuckling? couldn't you be parbuckling? couldn't he be parbuckling? couldn't we be parbuckling? couldn't you be parbuckling? couldn't they be parbuckling?
Perfect	V-ing perfect
couldn't I have parbuckled? couldn't you have parbuckled? couldn't he have parbuckled? couldn't we have parbuckled? couldn't you have parbuckled? couldn't they have parbuckled?	couldn't I have been parbuckling? couldn't you have been parbuckling? couldn't he have been parbuckling? couldn't we have been parbuckling? couldn't you have been parbuckling? couldn't they have been parbuckling?