must haven
Verbo regular: haven - havened- havened

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must haven
you must haven
he must haven
we must haven
you must haven
they must haven 	I must be havening
you must be havening
he must be havening
we must be havening
you must be havening
they must be havening	I must have havened
you must have havened
he must have havened
we must have havened
you must have havened
they must have havened	I must have been havening
you must have been havening
he must have been havening
we must have been havening
you must have been havening
they must have been havening	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't haven
you mustn't haven
he mustn't haven
we mustn't haven
you mustn't haven
they mustn't haven 	I mustn't be havening
you mustn't be havening
he mustn't be havening
we mustn't be havening
you mustn't be havening
they mustn't be havening	I mustn't have havened
you mustn't have havened
he mustn't have havened
we mustn't have havened
you mustn't have havened
they mustn't have havened	I mustn't have been havening
you mustn't have been havening
he mustn't have been havening
we mustn't have been havening
you mustn't have been havening
they mustn't have been havening	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I haven?
must you haven?
must he haven?
must we haven?
must you haven?
must they haven? 	must I be havening?
must you be havening?
must he be havening?
must we be havening?
must you be havening?
must they be havening? 	must I have havened?
must you have havened?
must he have havened?
must we have havened?
must you have havened?
must they have havened? 	must I have been havening?
must you have been havening?
must he have been havening?
must we have been havening?
must you have been havening?
must they have been havening? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I haven?
mustn't you haven?
mustn't he haven?
mustn't we haven?
mustn't you haven?
mustn't they haven? 	mustn't I be havening?
mustn't you be havening?
mustn't he be havening?
mustn't we be havening?
mustn't you be havening?
mustn't they be havening? 	mustn't I have havened?
mustn't you have havened?
mustn't he have havened?
mustn't we have havened?
mustn't you have havened?
mustn't they have havened? 	mustn't I have been havening?
mustn't you have been havening?
mustn't he have been havening?
mustn't we have been havening?
mustn't you have been havening?
mustn't they have been havening?