English verb conjugation
MUST SKIPPER

Regular verb: skipper - skippered - skippered

Affirmation

Simple form	V-ing form
I must skipper you must skipper she must skipper we must skipper you must skipper they must skipper	I must be skippering you must be skippering she must be skippering we must be skippering you must be skippering they must be skippering
Perfect	V-ing perfect
I must have skippered you must have skippered she must have skippered we must have skippered you must have skippered they must have skippered	I must have been skippering you must have been skippering she must have been skippering we must have been skippering you must have been skippering they must have been skippering

Negation

Simple form	V-ing form
I mustn't skipper you mustn't skipper she mustn't skipper we mustn't skipper you mustn't skipper they mustn't skipper	I mustn't be skippering you mustn't be skippering she mustn't be skippering we mustn't be skippering you mustn't be skippering they mustn't be skippering
Perfect	V-ing perfect
I mustn't have skippered you mustn't have skippered she mustn't have skippered we mustn't have skippered you mustn't have skippered they mustn't have skippered	I mustn't have been skippering you mustn't have been skippering she mustn't have been skippering we mustn't have been skippering you mustn't have been skippering they mustn't have been skippering

Interrogative form

Simple form	V-ing form
must I skipper? must you skipper? must she skipper? must we skipper? must you skipper? must they skipper?	must I be skippering? must you be skippering? must she be skippering? must we be skippering? must you be skippering? must they be skippering?
Perfect	V-ing perfect
must I have skippered? must you have skippered? must she have skippered? must we have skippered? must you have skippered? must they have skippered?	must I have been skippering? must you have been skippering? must she have been skippering? must we have been skippering? must you have been skippering? must they have been skippering?

Interro-negative form

Simple form	V-ing form
mustn't I skipper? mustn't you skipper? mustn't she skipper? mustn't we skipper? mustn't you skipper? mustn't they skipper?	mustn't I be skippering? mustn't you be skippering? mustn't she be skippering? mustn't we be skippering? mustn't you be skippering? mustn't they be skippering?
Perfect	V-ing perfect
mustn't I have skippered? mustn't you have skippered? mustn't she have skippered? mustn't we have skippered? mustn't you have skippered? mustn't they have skippered?	mustn't I have been skippering? mustn't you have been skippering? mustn't she have been skippering? mustn't we have been skippering? mustn't you have been skippering? mustn't they have been skippering?