must skateboard
Verbo regular: skateboard - skateboarded- skateboarded

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must skateboard
you must skateboard
he must skateboard
we must skateboard
you must skateboard
they must skateboard 	I must be skateboarding
you must be skateboarding
he must be skateboarding
we must be skateboarding
you must be skateboarding
they must be skateboarding	I must have skateboarded
you must have skateboarded
he must have skateboarded
we must have skateboarded
you must have skateboarded
they must have skateboarded	I must have been skateboarding
you must have been skateboarding
he must have been skateboarding
we must have been skateboarding
you must have been skateboarding
they must have been skateboarding	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not skateboard
you must not skateboard
he must not skateboard
we must not skateboard
you must not skateboard
they must not skateboard 	I must not be skateboarding
you must not be skateboarding
he must not be skateboarding
we must not be skateboarding
you must not be skateboarding
they must not be skateboarding	I must not have skateboarded
you must not have skateboarded
he must not have skateboarded
we must not have skateboarded
you must not have skateboarded
they must not have skateboarded	I must not have been skateboarding
you must not have been skateboarding
he must not have been skateboarding
we must not have been skateboarding
you must not have been skateboarding
they must not have been skateboarding	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I skateboard?
must you skateboard?
must he skateboard?
must we skateboard?
must you skateboard?
must they skateboard? 	must I be skateboarding?
must you be skateboarding?
must he be skateboarding?
must we be skateboarding?
must you be skateboarding?
must they be skateboarding? 	must I have skateboarded?
must you have skateboarded?
must he have skateboarded?
must we have skateboarded?
must you have skateboarded?
must they have skateboarded? 	must I have been skateboarding?
must you have been skateboarding?
must he have been skateboarding?
must we have been skateboarding?
must you have been skateboarding?
must they have been skateboarding? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not skateboard?
must you not skateboard?
must he not skateboard?
must we not skateboard?
must you not skateboard?
must they not skateboard? 	must I not be skateboarding?
must you not be skateboarding?
must he not be skateboarding?
must we not be skateboarding?
must you not be skateboarding?
must they not be skateboarding? 	must I not have skateboarded?
must you not have skateboarded?
must he not have skateboarded?
must we not have skateboarded?
must you not have skateboarded?
must they not have skateboarded? 	must I not have been skateboarding?
must you not have been skateboarding?
must he not have been skateboarding?
must we not have been skateboarding?
must you not have been skateboarding?
must they not have been skateboarding?