must haven
Verbe régulier : haven - havened- havened

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must haven
you must haven
she must haven
we must haven
you must haven
they must haven 	I must be havening
you must be havening
she must be havening
we must be havening
you must be havening
they must be havening	I must have havened
you must have havened
she 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
she must have been havening
we must have been havening
you must have been havening
they must have been havening	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't haven
you mustn't haven
she 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
she 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
she 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
she mustn't have been havening
we mustn't have been havening
you mustn't have been havening
they mustn't have been havening	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I haven?
must you haven?
must she haven?
must we haven?
must you haven?
must they haven? 	must I be havening?
must you be havening?
must she be havening?
must we be havening?
must you be havening?
must they be havening? 	must I have havened?
must you have havened?
must she 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 she have been havening?
must we have been havening?
must you have been havening?
must they have been havening? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I haven?
mustn't you haven?
mustn't she 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 she 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 she 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 she have been havening?
mustn't we have been havening?
mustn't you have been havening?
mustn't they have been havening?