English verb conjugation
COULD PURFLE

Regular verb: purfle - purfled - purfled

Affirmation

Simple form	V-ing form
I could purfle you could purfle she could purfle we could purfle you could purfle they could purfle	I could be purfling you could be purfling she could be purfling we could be purfling you could be purfling they could be purfling
Perfect	V-ing perfect
I could have purfled you could have purfled she could have purfled we could have purfled you could have purfled they could have purfled	I could have been purfling you could have been purfling she could have been purfling we could have been purfling you could have been purfling they could have been purfling

Negation

Simple form	V-ing form
I couldn't purfle you couldn't purfle she couldn't purfle we couldn't purfle you couldn't purfle they couldn't purfle	I couldn't be purfling you couldn't be purfling she couldn't be purfling we couldn't be purfling you couldn't be purfling they couldn't be purfling
Perfect	V-ing perfect
I couldn't have purfled you couldn't have purfled she couldn't have purfled we couldn't have purfled you couldn't have purfled they couldn't have purfled	I couldn't have been purfling you couldn't have been purfling she couldn't have been purfling we couldn't have been purfling you couldn't have been purfling they couldn't have been purfling

Interrogative form

Simple form	V-ing form
could I purfle? could you purfle? could she purfle? could we purfle? could you purfle? could they purfle?	could I be purfling? could you be purfling? could she be purfling? could we be purfling? could you be purfling? could they be purfling?
Perfect	V-ing perfect
could I have purfled? could you have purfled? could she have purfled? could we have purfled? could you have purfled? could they have purfled?	could I have been purfling? could you have been purfling? could she have been purfling? could we have been purfling? could you have been purfling? could they have been purfling?

Interro-negative form

Simple form	V-ing form
couldn't I purfle? couldn't you purfle? couldn't she purfle? couldn't we purfle? couldn't you purfle? couldn't they purfle?	couldn't I be purfling? couldn't you be purfling? couldn't she be purfling? couldn't we be purfling? couldn't you be purfling? couldn't they be purfling?
Perfect	V-ing perfect
couldn't I have purfled? couldn't you have purfled? couldn't she have purfled? couldn't we have purfled? couldn't you have purfled? couldn't they have purfled?	couldn't I have been purfling? couldn't you have been purfling? couldn't she have been purfling? couldn't we have been purfling? couldn't you have been purfling? couldn't they have been purfling?