must ventilate
Verbo regolare: ventilate - ventilated- ventilated

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must ventilate
you must ventilate
he must ventilate
we must ventilate
you must ventilate
they must ventilate 	I must be ventilating
you must be ventilating
he must be ventilating
we must be ventilating
you must be ventilating
they must be ventilating	I must have ventilated
you must have ventilated
he must have ventilated
we must have ventilated
you must have ventilated
they must have ventilated	I must have been ventilating
you must have been ventilating
he must have been ventilating
we must have been ventilating
you must have been ventilating
they must have been ventilating	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I mustn't ventilate
you mustn't ventilate
he mustn't ventilate
we mustn't ventilate
you mustn't ventilate
they mustn't ventilate 	I mustn't be ventilating
you mustn't be ventilating
he mustn't be ventilating
we mustn't be ventilating
you mustn't be ventilating
they mustn't be ventilating	I mustn't have ventilated
you mustn't have ventilated
he mustn't have ventilated
we mustn't have ventilated
you mustn't have ventilated
they mustn't have ventilated	I mustn't have been ventilating
you mustn't have been ventilating
he mustn't have been ventilating
we mustn't have been ventilating
you mustn't have been ventilating
they mustn't have been ventilating	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I ventilate?
must you ventilate?
must he ventilate?
must we ventilate?
must you ventilate?
must they ventilate? 	must I be ventilating?
must you be ventilating?
must he be ventilating?
must we be ventilating?
must you be ventilating?
must they be ventilating? 	must I have ventilated?
must you have ventilated?
must he have ventilated?
must we have ventilated?
must you have ventilated?
must they have ventilated? 	must I have been ventilating?
must you have been ventilating?
must he have been ventilating?
must we have been ventilating?
must you have been ventilating?
must they have been ventilating? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
mustn't I ventilate?
mustn't you ventilate?
mustn't he ventilate?
mustn't we ventilate?
mustn't you ventilate?
mustn't they ventilate? 	mustn't I be ventilating?
mustn't you be ventilating?
mustn't he be ventilating?
mustn't we be ventilating?
mustn't you be ventilating?
mustn't they be ventilating? 	mustn't I have ventilated?
mustn't you have ventilated?
mustn't he have ventilated?
mustn't we have ventilated?
mustn't you have ventilated?
mustn't they have ventilated? 	mustn't I have been ventilating?
mustn't you have been ventilating?
mustn't he have been ventilating?
mustn't we have been ventilating?
mustn't you have been ventilating?
mustn't they have been ventilating?