must suction
Verbo regular: suction - suctioned- suctioned

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must suction
you must suction
he must suction
we must suction
you must suction
they must suction 	I must be suctioning
you must be suctioning
he must be suctioning
we must be suctioning
you must be suctioning
they must be suctioning	I must have suctioned
you must have suctioned
he must have suctioned
we must have suctioned
you must have suctioned
they must have suctioned	I must have been suctioning
you must have been suctioning
he must have been suctioning
we must have been suctioning
you must have been suctioning
they must have been suctioning	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't suction
you mustn't suction
he mustn't suction
we mustn't suction
you mustn't suction
they mustn't suction 	I mustn't be suctioning
you mustn't be suctioning
he mustn't be suctioning
we mustn't be suctioning
you mustn't be suctioning
they mustn't be suctioning	I mustn't have suctioned
you mustn't have suctioned
he mustn't have suctioned
we mustn't have suctioned
you mustn't have suctioned
they mustn't have suctioned	I mustn't have been suctioning
you mustn't have been suctioning
he mustn't have been suctioning
we mustn't have been suctioning
you mustn't have been suctioning
they mustn't have been suctioning	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I suction?
must you suction?
must he suction?
must we suction?
must you suction?
must they suction? 	must I be suctioning?
must you be suctioning?
must he be suctioning?
must we be suctioning?
must you be suctioning?
must they be suctioning? 	must I have suctioned?
must you have suctioned?
must he have suctioned?
must we have suctioned?
must you have suctioned?
must they have suctioned? 	must I have been suctioning?
must you have been suctioning?
must he have been suctioning?
must we have been suctioning?
must you have been suctioning?
must they have been suctioning? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I suction?
mustn't you suction?
mustn't he suction?
mustn't we suction?
mustn't you suction?
mustn't they suction? 	mustn't I be suctioning?
mustn't you be suctioning?
mustn't he be suctioning?
mustn't we be suctioning?
mustn't you be suctioning?
mustn't they be suctioning? 	mustn't I have suctioned?
mustn't you have suctioned?
mustn't he have suctioned?
mustn't we have suctioned?
mustn't you have suctioned?
mustn't they have suctioned? 	mustn't I have been suctioning?
mustn't you have been suctioning?
mustn't he have been suctioning?
mustn't we have been suctioning?
mustn't you have been suctioning?
mustn't they have been suctioning?