I can purr you can purr she can purr we can purr you can purr they can purr
V-ing form
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
I can have purred you can have purred she can have purred we can have purred you can have purred they can have purred
V-ing perfect
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
I can't purr you can't purr she can't purr we can't purr you can't purr they can't purr
V-ing form
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
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
V-ing perfect
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
can I purr? can you purr? can she purr? can we purr? can you purr? can they purr?
V-ing form
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
can I have purred? can you have purred? can she have purred? can we have purred? can you have purred? can they have purred?
V-ing perfect
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
can't I purr? can't you purr? can't she purr? can't we purr? can't you purr? can't they purr?
V-ing form
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
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?
V-ing perfect
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?