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 cannot key you cannot key he cannot key we cannot key you cannot key they cannot key	I cannot be keying you cannot be keying he cannot be keying we cannot be keying you cannot be keying they cannot be keying
Perfect	V-ing perfect
I cannot have keyed you cannot have keyed he cannot have keyed we cannot have keyed you cannot have keyed they cannot have keyed	I cannot have been keying you cannot have been keying he cannot have been keying we cannot have been keying you cannot have been keying they cannot 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 I not key? can you not key? can he not key? can we not key? can you not key? can they not key?	can I not be keying? can you not be keying? can he not be keying? can we not be keying? can you not be keying? can they not be keying?
Perfect	V-ing perfect
can I not have keyed? can you not have keyed? can he not have keyed? can we not have keyed? can you not have keyed? can they not have keyed?	can I not have been keying? can you not have been keying? can he not have been keying? can we not have been keying? can you not have been keying? can they not have been keying?