must retighten
Verbo regular: retighten - retightened- retightened

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must retighten
you must retighten
he must retighten
we must retighten
you must retighten
they must retighten 	I must be retightening
you must be retightening
he must be retightening
we must be retightening
you must be retightening
they must be retightening	I must have retightened
you must have retightened
he must have retightened
we must have retightened
you must have retightened
they must have retightened	I must have been retightening
you must have been retightening
he must have been retightening
we must have been retightening
you must have been retightening
they must have been retightening	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't retighten
you mustn't retighten
he mustn't retighten
we mustn't retighten
you mustn't retighten
they mustn't retighten 	I mustn't be retightening
you mustn't be retightening
he mustn't be retightening
we mustn't be retightening
you mustn't be retightening
they mustn't be retightening	I mustn't have retightened
you mustn't have retightened
he mustn't have retightened
we mustn't have retightened
you mustn't have retightened
they mustn't have retightened	I mustn't have been retightening
you mustn't have been retightening
he mustn't have been retightening
we mustn't have been retightening
you mustn't have been retightening
they mustn't have been retightening	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I retighten?
must you retighten?
must he retighten?
must we retighten?
must you retighten?
must they retighten? 	must I be retightening?
must you be retightening?
must he be retightening?
must we be retightening?
must you be retightening?
must they be retightening? 	must I have retightened?
must you have retightened?
must he have retightened?
must we have retightened?
must you have retightened?
must they have retightened? 	must I have been retightening?
must you have been retightening?
must he have been retightening?
must we have been retightening?
must you have been retightening?
must they have been retightening? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I retighten?
mustn't you retighten?
mustn't he retighten?
mustn't we retighten?
mustn't you retighten?
mustn't they retighten? 	mustn't I be retightening?
mustn't you be retightening?
mustn't he be retightening?
mustn't we be retightening?
mustn't you be retightening?
mustn't they be retightening? 	mustn't I have retightened?
mustn't you have retightened?
mustn't he have retightened?
mustn't we have retightened?
mustn't you have retightened?
mustn't they have retightened? 	mustn't I have been retightening?
mustn't you have been retightening?
mustn't he have been retightening?
mustn't we have been retightening?
mustn't you have been retightening?
mustn't they have been retightening?