English verb conjugation
CAN KEY

Regular verb: key - keyed - keyed

Affirmation

Simple form	V-ing form
I can key you can key he can key we can key you can key they can key	I can be keying you can be keying he can be keying we can be keying you can be keying they can be keying
Perfect	V-ing perfect
I can have keyed you can have keyed he can have keyed we can have keyed you can have keyed they can have keyed	I can have been keying you can have been keying he can have been keying we can have been keying you can have been keying they can have been keying

Negation

Simple form	V-ing form
I can't key you can't key he can't key we can't key you can't key they can't key	I can't be keying you can't be keying he can't be keying we can't be keying you can't be keying they can't be keying
Perfect	V-ing perfect
I can't have keyed you can't have keyed he can't have keyed we can't have keyed you can't have keyed they can't have keyed	I can't have been keying you can't have been keying he can't have been keying we can't have been keying you can't have been keying they can't have been keying

Interrogative form

Simple form	V-ing form
can I key? can you key? can he key? can we key? can you key? can they key?	can I be keying? can you be keying? can he be keying? can we be keying? can you be keying? can they be keying?
Perfect	V-ing perfect
can I have keyed? can you have keyed? can he have keyed? can we have keyed? can you have keyed? can they have keyed?	can I have been keying? can you have been keying? can he have been keying? can we have been keying? can you have been keying? can they have been keying?

Interro-negative form

Simple form	V-ing form
can't I key? can't you key? can't he key? can't we key? can't you key? can't they key?	can't I be keying? can't you be keying? can't he be keying? can't we be keying? can't you be keying? can't they be keying?
Perfect	V-ing perfect
can't I have keyed? can't you have keyed? can't he have keyed? can't we have keyed? can't you have keyed? can't they have keyed?	can't I have been keying? can't you have been keying? can't he have been keying? can't we have been keying? can't you have been keying? can't they have been keying?