must treble
Verbo regular: treble - trebled- trebled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must treble
you must treble
he must treble
we must treble
you must treble
they must treble 	I must be trebling
you must be trebling
he must be trebling
we must be trebling
you must be trebling
they must be trebling	I must have trebled
you must have trebled
he 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
he must have been trebling
we must have been trebling
you must have been trebling
they must have been trebling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't treble
you mustn't treble
he 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
he 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
he 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
he mustn't have been trebling
we mustn't have been trebling
you mustn't have been trebling
they mustn't have been trebling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I treble?
must you treble?
must he treble?
must we treble?
must you treble?
must they treble? 	must I be trebling?
must you be trebling?
must he be trebling?
must we be trebling?
must you be trebling?
must they be trebling? 	must I have trebled?
must you have trebled?
must he 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 he have been trebling?
must we have been trebling?
must you have been trebling?
must they have been trebling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I treble?
mustn't you treble?
mustn't he 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 he 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 he 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 he have been trebling?
mustn't we have been trebling?
mustn't you have been trebling?
mustn't they have been trebling?