must lip
Verbe régulier : lip - liped- liped

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must lip
you must lip
he must lip
we must lip
you must lip
they must lip 	I must be liping
you must be liping
he must be liping
we must be liping
you must be liping
they must be liping	I must have liped
you must have liped
he must have liped
we must have liped
you must have liped
they must have liped	I must have been liping
you must have been liping
he must have been liping
we must have been liping
you must have been liping
they must have been liping	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't lip
you mustn't lip
he mustn't lip
we mustn't lip
you mustn't lip
they mustn't lip 	I mustn't be liping
you mustn't be liping
he mustn't be liping
we mustn't be liping
you mustn't be liping
they mustn't be liping	I mustn't have liped
you mustn't have liped
he mustn't have liped
we mustn't have liped
you mustn't have liped
they mustn't have liped	I mustn't have been liping
you mustn't have been liping
he mustn't have been liping
we mustn't have been liping
you mustn't have been liping
they mustn't have been liping	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I lip?
must you lip?
must he lip?
must we lip?
must you lip?
must they lip? 	must I be liping?
must you be liping?
must he be liping?
must we be liping?
must you be liping?
must they be liping? 	must I have liped?
must you have liped?
must he have liped?
must we have liped?
must you have liped?
must they have liped? 	must I have been liping?
must you have been liping?
must he have been liping?
must we have been liping?
must you have been liping?
must they have been liping? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I lip?
mustn't you lip?
mustn't he lip?
mustn't we lip?
mustn't you lip?
mustn't they lip? 	mustn't I be liping?
mustn't you be liping?
mustn't he be liping?
mustn't we be liping?
mustn't you be liping?
mustn't they be liping? 	mustn't I have liped?
mustn't you have liped?
mustn't he have liped?
mustn't we have liped?
mustn't you have liped?
mustn't they have liped? 	mustn't I have been liping?
mustn't you have been liping?
mustn't he have been liping?
mustn't we have been liping?
mustn't you have been liping?
mustn't they have been liping?