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 mustn't deter you mustn't deter he mustn't deter we mustn't deter you mustn't deter they mustn't deter	I mustn't be detering you mustn't be detering he mustn't be detering we mustn't be detering you mustn't be detering they mustn't be detering
Perfect	V-ing perfect
I mustn't have detered you mustn't have detered he mustn't have detered we mustn't have detered you mustn't have detered they mustn't have detered	I mustn't have been detering you mustn't have been detering he mustn't have been detering we mustn't have been detering you mustn't have been detering they mustn't 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
mustn't I deter? mustn't you deter? mustn't he deter? mustn't we deter? mustn't you deter? mustn't they deter?	mustn't I be detering? mustn't you be detering? mustn't he be detering? mustn't we be detering? mustn't you be detering? mustn't they be detering?
Perfect	V-ing perfect
mustn't I have detered? mustn't you have detered? mustn't he have detered? mustn't we have detered? mustn't you have detered? mustn't they have detered?	mustn't I have been detering? mustn't you have been detering? mustn't he have been detering? mustn't we have been detering? mustn't you have been detering? mustn't they have been detering?