English verb conjugation
MUST RET

Regular verb: ret - retted - retted

Affirmation

Simple form	V-ing form
I must ret you must ret she must ret we must ret you must ret they must ret	I must be retting you must be retting she must be retting we must be retting you must be retting they must be retting
Perfect	V-ing perfect
I must have retted you must have retted she must have retted we must have retted you must have retted they must have retted	I must have been retting you must have been retting she must have been retting we must have been retting you must have been retting they must have been retting

Negation

Simple form	V-ing form
I must not ret you must not ret she must not ret we must not ret you must not ret they must not ret	I must not be retting you must not be retting she must not be retting we must not be retting you must not be retting they must not be retting
Perfect	V-ing perfect
I must not have retted you must not have retted she must not have retted we must not have retted you must not have retted they must not have retted	I must not have been retting you must not have been retting she must not have been retting we must not have been retting you must not have been retting they must not have been retting

Interrogative form

Simple form	V-ing form
must I ret? must you ret? must she ret? must we ret? must you ret? must they ret?	must I be retting? must you be retting? must she be retting? must we be retting? must you be retting? must they be retting?
Perfect	V-ing perfect
must I have retted? must you have retted? must she have retted? must we have retted? must you have retted? must they have retted?	must I have been retting? must you have been retting? must she have been retting? must we have been retting? must you have been retting? must they have been retting?

Interro-negative form

Simple form	V-ing form
must I not ret? must you not ret? must she not ret? must we not ret? must you not ret? must they not ret?	must I not be retting? must you not be retting? must she not be retting? must we not be retting? must you not be retting? must they not be retting?
Perfect	V-ing perfect
must I not have retted? must you not have retted? must she not have retted? must we not have retted? must you not have retted? must they not have retted?	must I not have been retting? must you not have been retting? must she not have been retting? must we not have been retting? must you not have been retting? must they not have been retting?