must participate
Verbo regular: participate - participated- participated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must participate
you must participate
he must participate
we must participate
you must participate
they must participate 	I must be participating
you must be participating
he must be participating
we must be participating
you must be participating
they must be participating	I must have participated
you must have participated
he must have participated
we must have participated
you must have participated
they must have participated	I must have been participating
you must have been participating
he must have been participating
we must have been participating
you must have been participating
they must have been participating	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't participate
you mustn't participate
he mustn't participate
we mustn't participate
you mustn't participate
they mustn't participate 	I mustn't be participating
you mustn't be participating
he mustn't be participating
we mustn't be participating
you mustn't be participating
they mustn't be participating	I mustn't have participated
you mustn't have participated
he mustn't have participated
we mustn't have participated
you mustn't have participated
they mustn't have participated	I mustn't have been participating
you mustn't have been participating
he mustn't have been participating
we mustn't have been participating
you mustn't have been participating
they mustn't have been participating	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I participate?
must you participate?
must he participate?
must we participate?
must you participate?
must they participate? 	must I be participating?
must you be participating?
must he be participating?
must we be participating?
must you be participating?
must they be participating? 	must I have participated?
must you have participated?
must he have participated?
must we have participated?
must you have participated?
must they have participated? 	must I have been participating?
must you have been participating?
must he have been participating?
must we have been participating?
must you have been participating?
must they have been participating? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I participate?
mustn't you participate?
mustn't he participate?
mustn't we participate?
mustn't you participate?
mustn't they participate? 	mustn't I be participating?
mustn't you be participating?
mustn't he be participating?
mustn't we be participating?
mustn't you be participating?
mustn't they be participating? 	mustn't I have participated?
mustn't you have participated?
mustn't he have participated?
mustn't we have participated?
mustn't you have participated?
mustn't they have participated? 	mustn't I have been participating?
mustn't you have been participating?
mustn't he have been participating?
mustn't we have been participating?
mustn't you have been participating?
mustn't they have been participating?