I can skipper you can skipper she can skipper we can skipper you can skipper they can skipper
V-ing form
I can be skippering you can be skippering she can be skippering we can be skippering you can be skippering they can be skippering
Perfect
I can have skippered you can have skippered she can have skippered we can have skippered you can have skippered they can have skippered
V-ing perfect
I can have been skippering you can have been skippering she can have been skippering we can have been skippering you can have been skippering they can have been skippering
Negation
Simple form
I can't skipper you can't skipper she can't skipper we can't skipper you can't skipper they can't skipper
V-ing form
I can't be skippering you can't be skippering she can't be skippering we can't be skippering you can't be skippering they can't be skippering
Perfect
I can't have skippered you can't have skippered she can't have skippered we can't have skippered you can't have skippered they can't have skippered
V-ing perfect
I can't have been skippering you can't have been skippering she can't have been skippering we can't have been skippering you can't have been skippering they can't have been skippering
Interrogative form
Simple form
can I skipper? can you skipper? can she skipper? can we skipper? can you skipper? can they skipper?
V-ing form
can I be skippering? can you be skippering? can she be skippering? can we be skippering? can you be skippering? can they be skippering?
Perfect
can I have skippered? can you have skippered? can she have skippered? can we have skippered? can you have skippered? can they have skippered?
V-ing perfect
can I have been skippering? can you have been skippering? can she have been skippering? can we have been skippering? can you have been skippering? can they have been skippering?
Interro-negative form
Simple form
can't I skipper? can't you skipper? can't she skipper? can't we skipper? can't you skipper? can't they skipper?
V-ing form
can't I be skippering? can't you be skippering? can't she be skippering? can't we be skippering? can't you be skippering? can't they be skippering?
Perfect
can't I have skippered? can't you have skippered? can't she have skippered? can't we have skippered? can't you have skippered? can't they have skippered?
V-ing perfect
can't I have been skippering? can't you have been skippering? can't she have been skippering? can't we have been skippering? can't you have been skippering? can't they have been skippering?