could overtighten
Verbo regular: overtighten - overtightened- overtightened

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could overtighten
you could overtighten
she could overtighten
we could overtighten
you could overtighten
they could overtighten 	I could be overtightening
you could be overtightening
she could be overtightening
we could be overtightening
you could be overtightening
they could be overtightening	I could have overtightened
you could have overtightened
she could have overtightened
we could have overtightened
you could have overtightened
they could have overtightened	I could have been overtightening
you could have been overtightening
she could have been overtightening
we could have been overtightening
you could have been overtightening
they could have been overtightening	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not overtighten
you could not overtighten
she could not overtighten
we could not overtighten
you could not overtighten
they could not overtighten 	I could not be overtightening
you could not be overtightening
she could not be overtightening
we could not be overtightening
you could not be overtightening
they could not be overtightening	I could not have overtightened
you could not have overtightened
she could not have overtightened
we could not have overtightened
you could not have overtightened
they could not have overtightened	I could not have been overtightening
you could not have been overtightening
she could not have been overtightening
we could not have been overtightening
you could not have been overtightening
they could not have been overtightening	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I overtighten?
could you overtighten?
could she overtighten?
could we overtighten?
could you overtighten?
could they overtighten? 	could I be overtightening?
could you be overtightening?
could she be overtightening?
could we be overtightening?
could you be overtightening?
could they be overtightening? 	could I have overtightened?
could you have overtightened?
could she have overtightened?
could we have overtightened?
could you have overtightened?
could they have overtightened? 	could I have been overtightening?
could you have been overtightening?
could she have been overtightening?
could we have been overtightening?
could you have been overtightening?
could they have been overtightening? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not overtighten?
could you not overtighten?
could she not overtighten?
could we not overtighten?
could you not overtighten?
could they not overtighten? 	could I not be overtightening?
could you not be overtightening?
could she not be overtightening?
could we not be overtightening?
could you not be overtightening?
could they not be overtightening? 	could I not have overtightened?
could you not have overtightened?
could she not have overtightened?
could we not have overtightened?
could you not have overtightened?
could they not have overtightened? 	could I not have been overtightening?
could you not have been overtightening?
could she not have been overtightening?
could we not have been overtightening?
could you not have been overtightening?
could they not have been overtightening?