English verb conjugation
COULD PARTY

Regular verb: party - partied - partied

Affirmation

Simple form	V-ing form
I could party you could party he could party we could party you could party they could party	I could be partying you could be partying he could be partying we could be partying you could be partying they could be partying
Perfect	V-ing perfect
I could have partied you could have partied he could have partied we could have partied you could have partied they could have partied	I could have been partying you could have been partying he could have been partying we could have been partying you could have been partying they could have been partying

Negation

Simple form	V-ing form
I couldn't party you couldn't party he couldn't party we couldn't party you couldn't party they couldn't party	I couldn't be partying you couldn't be partying he couldn't be partying we couldn't be partying you couldn't be partying they couldn't be partying
Perfect	V-ing perfect
I couldn't have partied you couldn't have partied he couldn't have partied we couldn't have partied you couldn't have partied they couldn't have partied	I couldn't have been partying you couldn't have been partying he couldn't have been partying we couldn't have been partying you couldn't have been partying they couldn't have been partying

Interrogative form

Simple form	V-ing form
could I party? could you party? could he party? could we party? could you party? could they party?	could I be partying? could you be partying? could he be partying? could we be partying? could you be partying? could they be partying?
Perfect	V-ing perfect
could I have partied? could you have partied? could he have partied? could we have partied? could you have partied? could they have partied?	could I have been partying? could you have been partying? could he have been partying? could we have been partying? could you have been partying? could they have been partying?

Interro-negative form

Simple form	V-ing form
couldn't I party? couldn't you party? couldn't he party? couldn't we party? couldn't you party? couldn't they party?	couldn't I be partying? couldn't you be partying? couldn't he be partying? couldn't we be partying? couldn't you be partying? couldn't they be partying?
Perfect	V-ing perfect
couldn't I have partied? couldn't you have partied? couldn't he have partied? couldn't we have partied? couldn't you have partied? couldn't they have partied?	couldn't I have been partying? couldn't you have been partying? couldn't he have been partying? couldn't we have been partying? couldn't you have been partying? couldn't they have been partying?