must invalidate
Verbe régulier : invalidate - invalidated- invalidated
Traduction française : invalider - infirmer 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must invalidate
you must invalidate
he must invalidate
we must invalidate
you must invalidate
they must invalidate 	I must be invalidating
you must be invalidating
he must be invalidating
we must be invalidating
you must be invalidating
they must be invalidating	I must have invalidated
you must have invalidated
he must have invalidated
we must have invalidated
you must have invalidated
they must have invalidated	I must have been invalidating
you must have been invalidating
he must have been invalidating
we must have been invalidating
you must have been invalidating
they must have been invalidating	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not invalidate
you must not invalidate
he must not invalidate
we must not invalidate
you must not invalidate
they must not invalidate 	I must not be invalidating
you must not be invalidating
he must not be invalidating
we must not be invalidating
you must not be invalidating
they must not be invalidating	I must not have invalidated
you must not have invalidated
he must not have invalidated
we must not have invalidated
you must not have invalidated
they must not have invalidated	I must not have been invalidating
you must not have been invalidating
he must not have been invalidating
we must not have been invalidating
you must not have been invalidating
they must not have been invalidating	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I invalidate?
must you invalidate?
must he invalidate?
must we invalidate?
must you invalidate?
must they invalidate? 	must I be invalidating?
must you be invalidating?
must he be invalidating?
must we be invalidating?
must you be invalidating?
must they be invalidating? 	must I have invalidated?
must you have invalidated?
must he have invalidated?
must we have invalidated?
must you have invalidated?
must they have invalidated? 	must I have been invalidating?
must you have been invalidating?
must he have been invalidating?
must we have been invalidating?
must you have been invalidating?
must they have been invalidating? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not invalidate?
must you not invalidate?
must he not invalidate?
must we not invalidate?
must you not invalidate?
must they not invalidate? 	must I not be invalidating?
must you not be invalidating?
must he not be invalidating?
must we not be invalidating?
must you not be invalidating?
must they not be invalidating? 	must I not have invalidated?
must you not have invalidated?
must he not have invalidated?
must we not have invalidated?
must you not have invalidated?
must they not have invalidated? 	must I not have been invalidating?
must you not have been invalidating?
must he not have been invalidating?
must we not have been invalidating?
must you not have been invalidating?
must they not have been invalidating?