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 can't retail you can't retail he can't retail we can't retail you can't retail they can't retail	I can't be retailing you can't be retailing he can't be retailing we can't be retailing you can't be retailing they can't be retailing
Perfect	V-ing perfect
I can't have retailed you can't have retailed he can't have retailed we can't have retailed you can't have retailed they can't have retailed	I can't have been retailing you can't have been retailing he can't have been retailing we can't have been retailing you can't have been retailing they can't 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't I retail? can't you retail? can't he retail? can't we retail? can't you retail? can't they retail?	can't I be retailing? can't you be retailing? can't he be retailing? can't we be retailing? can't you be retailing? can't they be retailing?
Perfect	V-ing perfect
can't I have retailed? can't you have retailed? can't he have retailed? can't we have retailed? can't you have retailed? can't they have retailed?	can't I have been retailing? can't you have been retailing? can't he have been retailing? can't we have been retailing? can't you have been retailing? can't they have been retailing?