English verb conjugation
MUST UNDERSTEER

Regular verb: understeer - understeered - understeered

Affirmation

Simple form	V-ing form
I must understeer you must understeer she must understeer we must understeer you must understeer they must understeer	I must be understeering you must be understeering she must be understeering we must be understeering you must be understeering they must be understeering
Perfect	V-ing perfect
I must have understeered you must have understeered she must have understeered we must have understeered you must have understeered they must have understeered	I must have been understeering you must have been understeering she must have been understeering we must have been understeering you must have been understeering they must have been understeering

Negation

Simple form	V-ing form
I mustn't understeer you mustn't understeer she mustn't understeer we mustn't understeer you mustn't understeer they mustn't understeer	I mustn't be understeering you mustn't be understeering she mustn't be understeering we mustn't be understeering you mustn't be understeering they mustn't be understeering
Perfect	V-ing perfect
I mustn't have understeered you mustn't have understeered she mustn't have understeered we mustn't have understeered you mustn't have understeered they mustn't have understeered	I mustn't have been understeering you mustn't have been understeering she mustn't have been understeering we mustn't have been understeering you mustn't have been understeering they mustn't have been understeering

Interrogative form

Simple form	V-ing form
must I understeer? must you understeer? must she understeer? must we understeer? must you understeer? must they understeer?	must I be understeering? must you be understeering? must she be understeering? must we be understeering? must you be understeering? must they be understeering?
Perfect	V-ing perfect
must I have understeered? must you have understeered? must she have understeered? must we have understeered? must you have understeered? must they have understeered?	must I have been understeering? must you have been understeering? must she have been understeering? must we have been understeering? must you have been understeering? must they have been understeering?

Interro-negative form

Simple form	V-ing form
mustn't I understeer? mustn't you understeer? mustn't she understeer? mustn't we understeer? mustn't you understeer? mustn't they understeer?	mustn't I be understeering? mustn't you be understeering? mustn't she be understeering? mustn't we be understeering? mustn't you be understeering? mustn't they be understeering?
Perfect	V-ing perfect
mustn't I have understeered? mustn't you have understeered? mustn't she have understeered? mustn't we have understeered? mustn't you have understeered? mustn't they have understeered?	mustn't I have been understeering? mustn't you have been understeering? mustn't she have been understeering? mustn't we have been understeering? mustn't you have been understeering? mustn't they have been understeering?