must yo-yo
Verbo regular: yo-yo - yo-yoed- yo-yoed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must yo-yo
you must yo-yo
he must yo-yo
we must yo-yo
you must yo-yo
they must yo-yo 	I must be yo-yoing
you must be yo-yoing
he must be yo-yoing
we must be yo-yoing
you must be yo-yoing
they must be yo-yoing	I must have yo-yoed
you must have yo-yoed
he must have yo-yoed
we must have yo-yoed
you must have yo-yoed
they must have yo-yoed	I must have been yo-yoing
you must have been yo-yoing
he must have been yo-yoing
we must have been yo-yoing
you must have been yo-yoing
they must have been yo-yoing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not yo-yo
you must not yo-yo
he must not yo-yo
we must not yo-yo
you must not yo-yo
they must not yo-yo 	I must not be yo-yoing
you must not be yo-yoing
he must not be yo-yoing
we must not be yo-yoing
you must not be yo-yoing
they must not be yo-yoing	I must not have yo-yoed
you must not have yo-yoed
he must not have yo-yoed
we must not have yo-yoed
you must not have yo-yoed
they must not have yo-yoed	I must not have been yo-yoing
you must not have been yo-yoing
he must not have been yo-yoing
we must not have been yo-yoing
you must not have been yo-yoing
they must not have been yo-yoing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I yo-yo?
must you yo-yo?
must he yo-yo?
must we yo-yo?
must you yo-yo?
must they yo-yo? 	must I be yo-yoing?
must you be yo-yoing?
must he be yo-yoing?
must we be yo-yoing?
must you be yo-yoing?
must they be yo-yoing? 	must I have yo-yoed?
must you have yo-yoed?
must he have yo-yoed?
must we have yo-yoed?
must you have yo-yoed?
must they have yo-yoed? 	must I have been yo-yoing?
must you have been yo-yoing?
must he have been yo-yoing?
must we have been yo-yoing?
must you have been yo-yoing?
must they have been yo-yoing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not yo-yo?
must you not yo-yo?
must he not yo-yo?
must we not yo-yo?
must you not yo-yo?
must they not yo-yo? 	must I not be yo-yoing?
must you not be yo-yoing?
must he not be yo-yoing?
must we not be yo-yoing?
must you not be yo-yoing?
must they not be yo-yoing? 	must I not have yo-yoed?
must you not have yo-yoed?
must he not have yo-yoed?
must we not have yo-yoed?
must you not have yo-yoed?
must they not have yo-yoed? 	must I not have been yo-yoing?
must you not have been yo-yoing?
must he not have been yo-yoing?
must we not have been yo-yoing?
must you not have been yo-yoing?
must they not have been yo-yoing?