must tier
Verbe régulier : tier - tiered- tiered
Traduction française : disposer en gradins 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must tier
you must tier
he must tier
we must tier
you must tier
they must tier 	I must be tiering
you must be tiering
he must be tiering
we must be tiering
you must be tiering
they must be tiering	I must have tiered
you must have tiered
he must have tiered
we must have tiered
you must have tiered
they must have tiered	I must have been tiering
you must have been tiering
he must have been tiering
we must have been tiering
you must have been tiering
they must have been tiering	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't tier
you mustn't tier
he mustn't tier
we mustn't tier
you mustn't tier
they mustn't tier 	I mustn't be tiering
you mustn't be tiering
he mustn't be tiering
we mustn't be tiering
you mustn't be tiering
they mustn't be tiering	I mustn't have tiered
you mustn't have tiered
he mustn't have tiered
we mustn't have tiered
you mustn't have tiered
they mustn't have tiered	I mustn't have been tiering
you mustn't have been tiering
he mustn't have been tiering
we mustn't have been tiering
you mustn't have been tiering
they mustn't have been tiering	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I tier?
must you tier?
must he tier?
must we tier?
must you tier?
must they tier? 	must I be tiering?
must you be tiering?
must he be tiering?
must we be tiering?
must you be tiering?
must they be tiering? 	must I have tiered?
must you have tiered?
must he have tiered?
must we have tiered?
must you have tiered?
must they have tiered? 	must I have been tiering?
must you have been tiering?
must he have been tiering?
must we have been tiering?
must you have been tiering?
must they have been tiering? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I tier?
mustn't you tier?
mustn't he tier?
mustn't we tier?
mustn't you tier?
mustn't they tier? 	mustn't I be tiering?
mustn't you be tiering?
mustn't he be tiering?
mustn't we be tiering?
mustn't you be tiering?
mustn't they be tiering? 	mustn't I have tiered?
mustn't you have tiered?
mustn't he have tiered?
mustn't we have tiered?
mustn't you have tiered?
mustn't they have tiered? 	mustn't I have been tiering?
mustn't you have been tiering?
mustn't he have been tiering?
mustn't we have been tiering?
mustn't you have been tiering?
mustn't they have been tiering?