must skipper
Verbo regular: skipper - skippered- skippered

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must skipper
you must skipper
he must skipper
we must skipper
you must skipper
they must skipper 	I must be skippering
you must be skippering
he must be skippering
we must be skippering
you must be skippering
they must be skippering	I must have skippered
you must have skippered
he 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
he must have been skippering
we must have been skippering
you must have been skippering
they must have been skippering	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not skipper
you must not skipper
he 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
he must not be skippering
we must not be skippering
you must not be skippering
they must not be skippering	I must not have skippered
you must not have skippered
he 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
he must not have been skippering
we must not have been skippering
you must not have been skippering
they must not have been skippering	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I skipper?
must you skipper?
must he skipper?
must we skipper?
must you skipper?
must they skipper? 	must I be skippering?
must you be skippering?
must he be skippering?
must we be skippering?
must you be skippering?
must they be skippering? 	must I have skippered?
must you have skippered?
must he 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 he have been skippering?
must we have been skippering?
must you have been skippering?
must they have been skippering? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not skipper?
must you not skipper?
must he 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 he not be skippering?
must we not be skippering?
must you not be skippering?
must they not be skippering? 	must I not have skippered?
must you not have skippered?
must he 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 he not have been skippering?
must we not have been skippering?
must you not have been skippering?
must they not have been skippering?