must unknot
Verbo regular: unknot - unknotted- unknotted

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must unknot
you must unknot
he must unknot
we must unknot
you must unknot
they must unknot 	I must be unknotting
you must be unknotting
he must be unknotting
we must be unknotting
you must be unknotting
they must be unknotting	I must have unknotted
you must have unknotted
he must have unknotted
we must have unknotted
you must have unknotted
they must have unknotted	I must have been unknotting
you must have been unknotting
he must have been unknotting
we must have been unknotting
you must have been unknotting
they must have been unknotting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not unknot
you must not unknot
he must not unknot
we must not unknot
you must not unknot
they must not unknot 	I must not be unknotting
you must not be unknotting
he must not be unknotting
we must not be unknotting
you must not be unknotting
they must not be unknotting	I must not have unknotted
you must not have unknotted
he must not have unknotted
we must not have unknotted
you must not have unknotted
they must not have unknotted	I must not have been unknotting
you must not have been unknotting
he must not have been unknotting
we must not have been unknotting
you must not have been unknotting
they must not have been unknotting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I unknot?
must you unknot?
must he unknot?
must we unknot?
must you unknot?
must they unknot? 	must I be unknotting?
must you be unknotting?
must he be unknotting?
must we be unknotting?
must you be unknotting?
must they be unknotting? 	must I have unknotted?
must you have unknotted?
must he have unknotted?
must we have unknotted?
must you have unknotted?
must they have unknotted? 	must I have been unknotting?
must you have been unknotting?
must he have been unknotting?
must we have been unknotting?
must you have been unknotting?
must they have been unknotting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not unknot?
must you not unknot?
must he not unknot?
must we not unknot?
must you not unknot?
must they not unknot? 	must I not be unknotting?
must you not be unknotting?
must he not be unknotting?
must we not be unknotting?
must you not be unknotting?
must they not be unknotting? 	must I not have unknotted?
must you not have unknotted?
must he not have unknotted?
must we not have unknotted?
must you not have unknotted?
must they not have unknotted? 	must I not have been unknotting?
must you not have been unknotting?
must he not have been unknotting?
must we not have been unknotting?
must you not have been unknotting?
must they not have been unknotting?