English verb conjugation
MUST DETER

Regular verb: deter - detered - detered

Affirmation

Simple form	V-ing form
I must deter you must deter he must deter we must deter you must deter they must deter	I must be detering you must be detering he must be detering we must be detering you must be detering they must be detering
Perfect	V-ing perfect
I must have detered you must have detered he must have detered we must have detered you must have detered they must have detered	I must have been detering you must have been detering he must have been detering we must have been detering you must have been detering they must have been detering

Negation

Simple form	V-ing form
I must not deter you must not deter he must not deter we must not deter you must not deter they must not deter	I must not be detering you must not be detering he must not be detering we must not be detering you must not be detering they must not be detering
Perfect	V-ing perfect
I must not have detered you must not have detered he must not have detered we must not have detered you must not have detered they must not have detered	I must not have been detering you must not have been detering he must not have been detering we must not have been detering you must not have been detering they must not have been detering

Interrogative form

Simple form	V-ing form
must I deter? must you deter? must he deter? must we deter? must you deter? must they deter?	must I be detering? must you be detering? must he be detering? must we be detering? must you be detering? must they be detering?
Perfect	V-ing perfect
must I have detered? must you have detered? must he have detered? must we have detered? must you have detered? must they have detered?	must I have been detering? must you have been detering? must he have been detering? must we have been detering? must you have been detering? must they have been detering?

Interro-negative form

Simple form	V-ing form
must I not deter? must you not deter? must he not deter? must we not deter? must you not deter? must they not deter?	must I not be detering? must you not be detering? must he not be detering? must we not be detering? must you not be detering? must they not be detering?
Perfect	V-ing perfect
must I not have detered? must you not have detered? must he not have detered? must we not have detered? must you not have detered? must they not have detered?	must I not have been detering? must you not have been detering? must he not have been detering? must we not have been detering? must you not have been detering? must they not have been detering?