must lie
Verbe irrégulier : lie - lay- lain
Traduction française : mentir - être étendu 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must lie
you must lie
he must lie
we must lie
you must lie
they must lie 	I must be lying
you must be lying
he must be lying
we must be lying
you must be lying
they must be lying	I must have lain
you must have lain
he must have lain
we must have lain
you must have lain
they must have lain	I must have been lying
you must have been lying
he must have been lying
we must have been lying
you must have been lying
they must have been lying	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't lie
you mustn't lie
he mustn't lie
we mustn't lie
you mustn't lie
they mustn't lie 	I mustn't be lying
you mustn't be lying
he mustn't be lying
we mustn't be lying
you mustn't be lying
they mustn't be lying	I mustn't have lain
you mustn't have lain
he mustn't have lain
we mustn't have lain
you mustn't have lain
they mustn't have lain	I mustn't have been lying
you mustn't have been lying
he mustn't have been lying
we mustn't have been lying
you mustn't have been lying
they mustn't have been lying	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I lie?
must you lie?
must he lie?
must we lie?
must you lie?
must they lie? 	must I be lying?
must you be lying?
must he be lying?
must we be lying?
must you be lying?
must they be lying? 	must I have lain?
must you have lain?
must he have lain?
must we have lain?
must you have lain?
must they have lain? 	must I have been lying?
must you have been lying?
must he have been lying?
must we have been lying?
must you have been lying?
must they have been lying? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I lie?
mustn't you lie?
mustn't he lie?
mustn't we lie?
mustn't you lie?
mustn't they lie? 	mustn't I be lying?
mustn't you be lying?
mustn't he be lying?
mustn't we be lying?
mustn't you be lying?
mustn't they be lying? 	mustn't I have lain?
mustn't you have lain?
mustn't he have lain?
mustn't we have lain?
mustn't you have lain?
mustn't they have lain? 	mustn't I have been lying?
mustn't you have been lying?
mustn't he have been lying?
mustn't we have been lying?
mustn't you have been lying?
mustn't they have been lying?