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
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	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not treble
you must not treble
she must not treble
we must not treble
you must not treble
they must not treble 	I must not be trebling
you must not be trebling
she must not be trebling
we must not be trebling
you must not be trebling
they must not be trebling	I must not have trebled
you must not have trebled
she must not have trebled
we must not have trebled
you must not have trebled
they must not have trebled	I must not have been trebling
you must not have been trebling
she must not have been trebling
we must not have been trebling
you must not have been trebling
they must not have been trebling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not treble?
must you not treble?
must she not treble?
must we not treble?
must you not treble?
must they not treble? 	must I not be trebling?
must you not be trebling?
must she not be trebling?
must we not be trebling?
must you not be trebling?
must they not be trebling? 	must I not have trebled?
must you not have trebled?
must she not have trebled?
must we not have trebled?
must you not have trebled?
must they not have trebled? 	must I not have been trebling?
must you not have been trebling?
must she not have been trebling?
must we not have been trebling?
must you not have been trebling?
must they not have been trebling?