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 must not skipper you must not skipper she must not skipper we must not skipper you must not skipper they must not skipper	I must not be skippering you must not be skippering she must not be skippering we must not be skippering you must not be skippering they must not be skippering
Perfect	V-ing perfect
I must not have skippered you must not have skippered she must not have skippered we must not have skippered you must not have skippered they must not have skippered	I must not have been skippering you must not have been skippering she must not have been skippering we must not have been skippering you must not have been skippering they must not 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
must I not skipper? must you not skipper? must she not skipper? must we not skipper? must you not skipper? must they not skipper?	must I not be skippering? must you not be skippering? must she not be skippering? must we not be skippering? must you not be skippering? must they not be skippering?
Perfect	V-ing perfect
must I not have skippered? must you not have skippered? must she not have skippered? must we not have skippered? must you not have skippered? must they not have skippered?	must I not have been skippering? must you not have been skippering? must she not have been skippering? must we not have been skippering? must you not have been skippering? must they not have been skippering?