must treble
Verbe régulier : treble - trebled- trebled
Traduction française : tripler 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must treble
you must treble
she must treble
we must treble
you must treble
they must treble 	I must be trebling
you must be trebling
she must be trebling
we must be trebling
you must be trebling
they must be trebling	I must have trebled
you must have trebled
she must have trebled
we must have trebled
you must have trebled
they must have trebled	I must have been trebling
you must have been trebling
she must have been trebling
we must have been trebling
you must have been trebling
they must have been trebling	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't treble
you mustn't treble
she mustn't treble
we mustn't treble
you mustn't treble
they mustn't treble 	I mustn't be trebling
you mustn't be trebling
she mustn't be trebling
we mustn't be trebling
you mustn't be trebling
they mustn't be trebling	I mustn't have trebled
you mustn't have trebled
she mustn't have trebled
we mustn't have trebled
you mustn't have trebled
they mustn't have trebled	I mustn't have been trebling
you mustn't have been trebling
she mustn't have been trebling
we mustn't have been trebling
you mustn't have been trebling
they mustn't have been trebling	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I treble?
must you treble?
must she treble?
must we treble?
must you treble?
must they treble? 	must I be trebling?
must you be trebling?
must she be trebling?
must we be trebling?
must you be trebling?
must they be trebling? 	must I have trebled?
must you have trebled?
must she have trebled?
must we have trebled?
must you have trebled?
must they have trebled? 	must I have been trebling?
must you have been trebling?
must she have been trebling?
must we have been trebling?
must you have been trebling?
must they have been trebling? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I treble?
mustn't you treble?
mustn't she treble?
mustn't we treble?
mustn't you treble?
mustn't they treble? 	mustn't I be trebling?
mustn't you be trebling?
mustn't she be trebling?
mustn't we be trebling?
mustn't you be trebling?
mustn't they be trebling? 	mustn't I have trebled?
mustn't you have trebled?
mustn't she have trebled?
mustn't we have trebled?
mustn't you have trebled?
mustn't they have trebled? 	mustn't I have been trebling?
mustn't you have been trebling?
mustn't she have been trebling?
mustn't we have been trebling?
mustn't you have been trebling?
mustn't they have been trebling?