English verb conjugation
CAN KO

Regular verb: ko - koed - koed

Affirmation

Simple form	V-ing form
I can ko you can ko he can ko we can ko you can ko they can ko	I can be koing you can be koing he can be koing we can be koing you can be koing they can be koing
Perfect	V-ing perfect
I can have koed you can have koed he can have koed we can have koed you can have koed they can have koed	I can have been koing you can have been koing he can have been koing we can have been koing you can have been koing they can have been koing

Negation

Simple form	V-ing form
I can't ko you can't ko he can't ko we can't ko you can't ko they can't ko	I can't be koing you can't be koing he can't be koing we can't be koing you can't be koing they can't be koing
Perfect	V-ing perfect
I can't have koed you can't have koed he can't have koed we can't have koed you can't have koed they can't have koed	I can't have been koing you can't have been koing he can't have been koing we can't have been koing you can't have been koing they can't have been koing

Interrogative form

Simple form	V-ing form
can I ko? can you ko? can he ko? can we ko? can you ko? can they ko?	can I be koing? can you be koing? can he be koing? can we be koing? can you be koing? can they be koing?
Perfect	V-ing perfect
can I have koed? can you have koed? can he have koed? can we have koed? can you have koed? can they have koed?	can I have been koing? can you have been koing? can he have been koing? can we have been koing? can you have been koing? can they have been koing?

Interro-negative form

Simple form	V-ing form
can't I ko? can't you ko? can't he ko? can't we ko? can't you ko? can't they ko?	can't I be koing? can't you be koing? can't he be koing? can't we be koing? can't you be koing? can't they be koing?
Perfect	V-ing perfect
can't I have koed? can't you have koed? can't he have koed? can't we have koed? can't you have koed? can't they have koed?	can't I have been koing? can't you have been koing? can't he have been koing? can't we have been koing? can't you have been koing? can't they have been koing?