English verb conjugation
COULD KEY

Regular verb: key - keyed - keyed

Affirmation

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

Negation

Simple form	V-ing form
I could not key you could not key he could not key we could not key you could not key they could not key	I could not be keying you could not be keying he could not be keying we could not be keying you could not be keying they could not be keying
Perfect	V-ing perfect
I could not have keyed you could not have keyed he could not have keyed we could not have keyed you could not have keyed they could not have keyed	I could not have been keying you could not have been keying he could not have been keying we could not have been keying you could not have been keying they could not have been keying

Interrogative form

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

Interro-negative form

Simple form	V-ing form
could I not key? could you not key? could he not key? could we not key? could you not key? could they not key?	could I not be keying? could you not be keying? could he not be keying? could we not be keying? could you not be keying? could they not be keying?
Perfect	V-ing perfect
could I not have keyed? could you not have keyed? could he not have keyed? could we not have keyed? could you not have keyed? could they not have keyed?	could I not have been keying? could you not have been keying? could he not have been keying? could we not have been keying? could you not have been keying? could they not have been keying?