English verb conjugation
CAN PURR

Regular verb: purr - purred - purred

Affirmation

Simple form	V-ing form
I can purr you can purr she can purr we can purr you can purr they can purr	I can be purring you can be purring she 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 she 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 she 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 she 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 she 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 she 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 she 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 she purr? can we purr? can you purr? can they purr?	can I be purring? can you be purring? can she 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 she 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 she 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 she 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 she 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 she 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 she have been purring? can't we have been purring? can't you have been purring? can't they have been purring?