must clench
Verbe régulier : clench - clenched- clenched
Traduction française : serrer - empoigner 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must clench
you must clench
she must clench
we must clench
you must clench
they must clench 	I must be clenching
you must be clenching
she must be clenching
we must be clenching
you must be clenching
they must be clenching	I must have clenched
you must have clenched
she must have clenched
we must have clenched
you must have clenched
they must have clenched	I must have been clenching
you must have been clenching
she must have been clenching
we must have been clenching
you must have been clenching
they must have been clenching	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't clench
you mustn't clench
she mustn't clench
we mustn't clench
you mustn't clench
they mustn't clench 	I mustn't be clenching
you mustn't be clenching
she mustn't be clenching
we mustn't be clenching
you mustn't be clenching
they mustn't be clenching	I mustn't have clenched
you mustn't have clenched
she mustn't have clenched
we mustn't have clenched
you mustn't have clenched
they mustn't have clenched	I mustn't have been clenching
you mustn't have been clenching
she mustn't have been clenching
we mustn't have been clenching
you mustn't have been clenching
they mustn't have been clenching	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I clench?
must you clench?
must she clench?
must we clench?
must you clench?
must they clench? 	must I be clenching?
must you be clenching?
must she be clenching?
must we be clenching?
must you be clenching?
must they be clenching? 	must I have clenched?
must you have clenched?
must she have clenched?
must we have clenched?
must you have clenched?
must they have clenched? 	must I have been clenching?
must you have been clenching?
must she have been clenching?
must we have been clenching?
must you have been clenching?
must they have been clenching? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I clench?
mustn't you clench?
mustn't she clench?
mustn't we clench?
mustn't you clench?
mustn't they clench? 	mustn't I be clenching?
mustn't you be clenching?
mustn't she be clenching?
mustn't we be clenching?
mustn't you be clenching?
mustn't they be clenching? 	mustn't I have clenched?
mustn't you have clenched?
mustn't she have clenched?
mustn't we have clenched?
mustn't you have clenched?
mustn't they have clenched? 	mustn't I have been clenching?
mustn't you have been clenching?
mustn't she have been clenching?
mustn't we have been clenching?
mustn't you have been clenching?
mustn't they have been clenching?