English verb conjugation
CAN PURR

Regular verb: purr - purred - purred

Affirmation

Simple form	V-ing form
I can purr you can purr he can purr we can purr you can purr they can purr	I can be purring you can be purring he can be purring we can be purring you can be purring they can be purring
Perfect	V-ing perfect
I can have purred you can have purred he can have purred we can have purred you can have purred they can have purred	I can have been purring you can have been purring he can have been purring we can have been purring you can have been purring they can have been purring

Negation

Simple form	V-ing form
I can't purr you can't purr he can't purr we can't purr you can't purr they can't purr	I can't be purring you can't be purring he can't be purring we can't be purring you can't be purring they can't be purring
Perfect	V-ing perfect
I can't have purred you can't have purred he can't have purred we can't have purred you can't have purred they can't have purred	I can't have been purring you can't have been purring he can't have been purring we can't have been purring you can't have been purring they can't have been purring

Interrogative form

Simple form	V-ing form
can I purr? can you purr? can he purr? can we purr? can you purr? can they purr?	can I be purring? can you be purring? can he be purring? can we be purring? can you be purring? can they be purring?
Perfect	V-ing perfect
can I have purred? can you have purred? can he have purred? can we have purred? can you have purred? can they have purred?	can I have been purring? can you have been purring? can he have been purring? can we have been purring? can you have been purring? can they have been purring?

Interro-negative form

Simple form	V-ing form
can't I purr? can't you purr? can't he purr? can't we purr? can't you purr? can't they purr?	can't I be purring? can't you be purring? can't he be purring? can't we be purring? can't you be purring? can't they be purring?
Perfect	V-ing perfect
can't I have purred? can't you have purred? can't he have purred? can't we have purred? can't you have purred? can't they have purred?	can't I have been purring? can't you have been purring? can't he have been purring? can't we have been purring? can't you have been purring? can't they have been purring?