must invalid
Verbe régulier : invalid - invalided- invalided
Traduction française : rendre infirme 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must invalid
you must invalid
she must invalid
we must invalid
you must invalid
they must invalid 	I must be invaliding
you must be invaliding
she must be invaliding
we must be invaliding
you must be invaliding
they must be invaliding	I must have invalided
you must have invalided
she must have invalided
we must have invalided
you must have invalided
they must have invalided	I must have been invaliding
you must have been invaliding
she must have been invaliding
we must have been invaliding
you must have been invaliding
they must have been invaliding	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't invalid
you mustn't invalid
she mustn't invalid
we mustn't invalid
you mustn't invalid
they mustn't invalid 	I mustn't be invaliding
you mustn't be invaliding
she mustn't be invaliding
we mustn't be invaliding
you mustn't be invaliding
they mustn't be invaliding	I mustn't have invalided
you mustn't have invalided
she mustn't have invalided
we mustn't have invalided
you mustn't have invalided
they mustn't have invalided	I mustn't have been invaliding
you mustn't have been invaliding
she mustn't have been invaliding
we mustn't have been invaliding
you mustn't have been invaliding
they mustn't have been invaliding	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I invalid?
must you invalid?
must she invalid?
must we invalid?
must you invalid?
must they invalid? 	must I be invaliding?
must you be invaliding?
must she be invaliding?
must we be invaliding?
must you be invaliding?
must they be invaliding? 	must I have invalided?
must you have invalided?
must she have invalided?
must we have invalided?
must you have invalided?
must they have invalided? 	must I have been invaliding?
must you have been invaliding?
must she have been invaliding?
must we have been invaliding?
must you have been invaliding?
must they have been invaliding? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I invalid?
mustn't you invalid?
mustn't she invalid?
mustn't we invalid?
mustn't you invalid?
mustn't they invalid? 	mustn't I be invaliding?
mustn't you be invaliding?
mustn't she be invaliding?
mustn't we be invaliding?
mustn't you be invaliding?
mustn't they be invaliding? 	mustn't I have invalided?
mustn't you have invalided?
mustn't she have invalided?
mustn't we have invalided?
mustn't you have invalided?
mustn't they have invalided? 	mustn't I have been invaliding?
mustn't you have been invaliding?
mustn't she have been invaliding?
mustn't we have been invaliding?
mustn't you have been invaliding?
mustn't they have been invaliding?