English verb conjugation
CAN RETAIL

Regular verb: retail - retailed - retailed

Affirmation

Simple form	V-ing form
I can retail you can retail he can retail we can retail you can retail they can retail	I can be retailing you can be retailing he can be retailing we can be retailing you can be retailing they can be retailing
Perfect	V-ing perfect
I can have retailed you can have retailed he can have retailed we can have retailed you can have retailed they can have retailed	I can have been retailing you can have been retailing he can have been retailing we can have been retailing you can have been retailing they can have been retailing

Negation

Simple form	V-ing form
I cannot retail you cannot retail he cannot retail we cannot retail you cannot retail they cannot retail	I cannot be retailing you cannot be retailing he cannot be retailing we cannot be retailing you cannot be retailing they cannot be retailing
Perfect	V-ing perfect
I cannot have retailed you cannot have retailed he cannot have retailed we cannot have retailed you cannot have retailed they cannot have retailed	I cannot have been retailing you cannot have been retailing he cannot have been retailing we cannot have been retailing you cannot have been retailing they cannot have been retailing

Interrogative form

Simple form	V-ing form
can I retail? can you retail? can he retail? can we retail? can you retail? can they retail?	can I be retailing? can you be retailing? can he be retailing? can we be retailing? can you be retailing? can they be retailing?
Perfect	V-ing perfect
can I have retailed? can you have retailed? can he have retailed? can we have retailed? can you have retailed? can they have retailed?	can I have been retailing? can you have been retailing? can he have been retailing? can we have been retailing? can you have been retailing? can they have been retailing?

Interro-negative form

Simple form	V-ing form
can I not retail? can you not retail? can he not retail? can we not retail? can you not retail? can they not retail?	can I not be retailing? can you not be retailing? can he not be retailing? can we not be retailing? can you not be retailing? can they not be retailing?
Perfect	V-ing perfect
can I not have retailed? can you not have retailed? can he not have retailed? can we not have retailed? can you not have retailed? can they not have retailed?	can I not have been retailing? can you not have been retailing? can he not have been retailing? can we not have been retailing? can you not have been retailing? can they not have been retailing?