must yoo-hoo
Verbe régulier : yoo-hoo - yoo-hooed- yoo-hooed

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must yoo-hoo
you must yoo-hoo
he must yoo-hoo
we must yoo-hoo
you must yoo-hoo
they must yoo-hoo 	I must be yoo-hooing
you must be yoo-hooing
he must be yoo-hooing
we must be yoo-hooing
you must be yoo-hooing
they must be yoo-hooing	I must have yoo-hooed
you must have yoo-hooed
he must have yoo-hooed
we must have yoo-hooed
you must have yoo-hooed
they must have yoo-hooed	I must have been yoo-hooing
you must have been yoo-hooing
he must have been yoo-hooing
we must have been yoo-hooing
you must have been yoo-hooing
they must have been yoo-hooing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't yoo-hoo
you mustn't yoo-hoo
he mustn't yoo-hoo
we mustn't yoo-hoo
you mustn't yoo-hoo
they mustn't yoo-hoo 	I mustn't be yoo-hooing
you mustn't be yoo-hooing
he mustn't be yoo-hooing
we mustn't be yoo-hooing
you mustn't be yoo-hooing
they mustn't be yoo-hooing	I mustn't have yoo-hooed
you mustn't have yoo-hooed
he mustn't have yoo-hooed
we mustn't have yoo-hooed
you mustn't have yoo-hooed
they mustn't have yoo-hooed	I mustn't have been yoo-hooing
you mustn't have been yoo-hooing
he mustn't have been yoo-hooing
we mustn't have been yoo-hooing
you mustn't have been yoo-hooing
they mustn't have been yoo-hooing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I yoo-hoo?
must you yoo-hoo?
must he yoo-hoo?
must we yoo-hoo?
must you yoo-hoo?
must they yoo-hoo? 	must I be yoo-hooing?
must you be yoo-hooing?
must he be yoo-hooing?
must we be yoo-hooing?
must you be yoo-hooing?
must they be yoo-hooing? 	must I have yoo-hooed?
must you have yoo-hooed?
must he have yoo-hooed?
must we have yoo-hooed?
must you have yoo-hooed?
must they have yoo-hooed? 	must I have been yoo-hooing?
must you have been yoo-hooing?
must he have been yoo-hooing?
must we have been yoo-hooing?
must you have been yoo-hooing?
must they have been yoo-hooing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I yoo-hoo?
mustn't you yoo-hoo?
mustn't he yoo-hoo?
mustn't we yoo-hoo?
mustn't you yoo-hoo?
mustn't they yoo-hoo? 	mustn't I be yoo-hooing?
mustn't you be yoo-hooing?
mustn't he be yoo-hooing?
mustn't we be yoo-hooing?
mustn't you be yoo-hooing?
mustn't they be yoo-hooing? 	mustn't I have yoo-hooed?
mustn't you have yoo-hooed?
mustn't he have yoo-hooed?
mustn't we have yoo-hooed?
mustn't you have yoo-hooed?
mustn't they have yoo-hooed? 	mustn't I have been yoo-hooing?
mustn't you have been yoo-hooing?
mustn't he have been yoo-hooing?
mustn't we have been yoo-hooing?
mustn't you have been yoo-hooing?
mustn't they have been yoo-hooing?