English verb conjugation
CAN PIE

Regular verb: pie - pied - pied

Affirmation

Simple form	V-ing form
I can pie you can pie he can pie we can pie you can pie they can pie	I can be pying you can be pying he can be pying we can be pying you can be pying they can be pying
Perfect	V-ing perfect
I can have pied you can have pied he can have pied we can have pied you can have pied they can have pied	I can have been pying you can have been pying he can have been pying we can have been pying you can have been pying they can have been pying

Negation

Simple form	V-ing form
I can't pie you can't pie he can't pie we can't pie you can't pie they can't pie	I can't be pying you can't be pying he can't be pying we can't be pying you can't be pying they can't be pying
Perfect	V-ing perfect
I can't have pied you can't have pied he can't have pied we can't have pied you can't have pied they can't have pied	I can't have been pying you can't have been pying he can't have been pying we can't have been pying you can't have been pying they can't have been pying

Interrogative form

Simple form	V-ing form
can I pie? can you pie? can he pie? can we pie? can you pie? can they pie?	can I be pying? can you be pying? can he be pying? can we be pying? can you be pying? can they be pying?
Perfect	V-ing perfect
can I have pied? can you have pied? can he have pied? can we have pied? can you have pied? can they have pied?	can I have been pying? can you have been pying? can he have been pying? can we have been pying? can you have been pying? can they have been pying?

Interro-negative form

Simple form	V-ing form
can't I pie? can't you pie? can't he pie? can't we pie? can't you pie? can't they pie?	can't I be pying? can't you be pying? can't he be pying? can't we be pying? can't you be pying? can't they be pying?
Perfect	V-ing perfect
can't I have pied? can't you have pied? can't he have pied? can't we have pied? can't you have pied? can't they have pied?	can't I have been pying? can't you have been pying? can't he have been pying? can't we have been pying? can't you have been pying? can't they have been pying?