English verb conjugation
MUST RETAIL

Regular verb: retail - retailed - retailed

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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