English verb conjugation
MUST COWER

Regular verb: cower - cowered - cowered

Affirmation

Simple form	V-ing form
I must cower you must cower he must cower we must cower you must cower they must cower	I must be cowering you must be cowering he must be cowering we must be cowering you must be cowering they must be cowering
Perfect	V-ing perfect
I must have cowered you must have cowered he must have cowered we must have cowered you must have cowered they must have cowered	I must have been cowering you must have been cowering he must have been cowering we must have been cowering you must have been cowering they must have been cowering

Negation

Simple form	V-ing form
I mustn't cower you mustn't cower he mustn't cower we mustn't cower you mustn't cower they mustn't cower	I mustn't be cowering you mustn't be cowering he mustn't be cowering we mustn't be cowering you mustn't be cowering they mustn't be cowering
Perfect	V-ing perfect
I mustn't have cowered you mustn't have cowered he mustn't have cowered we mustn't have cowered you mustn't have cowered they mustn't have cowered	I mustn't have been cowering you mustn't have been cowering he mustn't have been cowering we mustn't have been cowering you mustn't have been cowering they mustn't have been cowering

Interrogative form

Simple form	V-ing form
must I cower? must you cower? must he cower? must we cower? must you cower? must they cower?	must I be cowering? must you be cowering? must he be cowering? must we be cowering? must you be cowering? must they be cowering?
Perfect	V-ing perfect
must I have cowered? must you have cowered? must he have cowered? must we have cowered? must you have cowered? must they have cowered?	must I have been cowering? must you have been cowering? must he have been cowering? must we have been cowering? must you have been cowering? must they have been cowering?

Interro-negative form

Simple form	V-ing form
mustn't I cower? mustn't you cower? mustn't he cower? mustn't we cower? mustn't you cower? mustn't they cower?	mustn't I be cowering? mustn't you be cowering? mustn't he be cowering? mustn't we be cowering? mustn't you be cowering? mustn't they be cowering?
Perfect	V-ing perfect
mustn't I have cowered? mustn't you have cowered? mustn't he have cowered? mustn't we have cowered? mustn't you have cowered? mustn't they have cowered?	mustn't I have been cowering? mustn't you have been cowering? mustn't he have been cowering? mustn't we have been cowering? mustn't you have been cowering? mustn't they have been cowering?