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 must not clench
you must not clench
she must not clench
we must not clench
you must not clench
they must not clench 	I must not be clenching
you must not be clenching
she must not be clenching
we must not be clenching
you must not be clenching
they must not be clenching	I must not have clenched
you must not have clenched
she must not have clenched
we must not have clenched
you must not have clenched
they must not have clenched	I must not have been clenching
you must not have been clenching
she must not have been clenching
we must not have been clenching
you must not have been clenching
they must not 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 	
must I not clench?
must you not clench?
must she not clench?
must we not clench?
must you not clench?
must they not clench? 	must I not be clenching?
must you not be clenching?
must she not be clenching?
must we not be clenching?
must you not be clenching?
must they not be clenching? 	must I not have clenched?
must you not have clenched?
must she not have clenched?
must we not have clenched?
must you not have clenched?
must they not have clenched? 	must I not have been clenching?
must you not have been clenching?
must she not have been clenching?
must we not have been clenching?
must you not have been clenching?
must they not have been clenching?