English verb conjugation
CAN CODIFY

Regular verb: codify - codified - codified

Affirmation

Simple form	V-ing form
I can codify you can codify he can codify we can codify you can codify they can codify	I can be codifying you can be codifying he can be codifying we can be codifying you can be codifying they can be codifying
Perfect	V-ing perfect
I can have codified you can have codified he can have codified we can have codified you can have codified they can have codified	I can have been codifying you can have been codifying he can have been codifying we can have been codifying you can have been codifying they can have been codifying

Negation

Simple form	V-ing form
I can't codify you can't codify he can't codify we can't codify you can't codify they can't codify	I can't be codifying you can't be codifying he can't be codifying we can't be codifying you can't be codifying they can't be codifying
Perfect	V-ing perfect
I can't have codified you can't have codified he can't have codified we can't have codified you can't have codified they can't have codified	I can't have been codifying you can't have been codifying he can't have been codifying we can't have been codifying you can't have been codifying they can't have been codifying

Interrogative form

Simple form	V-ing form
can I codify? can you codify? can he codify? can we codify? can you codify? can they codify?	can I be codifying? can you be codifying? can he be codifying? can we be codifying? can you be codifying? can they be codifying?
Perfect	V-ing perfect
can I have codified? can you have codified? can he have codified? can we have codified? can you have codified? can they have codified?	can I have been codifying? can you have been codifying? can he have been codifying? can we have been codifying? can you have been codifying? can they have been codifying?

Interro-negative form

Simple form	V-ing form
can't I codify? can't you codify? can't he codify? can't we codify? can't you codify? can't they codify?	can't I be codifying? can't you be codifying? can't he be codifying? can't we be codifying? can't you be codifying? can't they be codifying?
Perfect	V-ing perfect
can't I have codified? can't you have codified? can't he have codified? can't we have codified? can't you have codified? can't they have codified?	can't I have been codifying? can't you have been codifying? can't he have been codifying? can't we have been codifying? can't you have been codifying? can't they have been codifying?