could refrain
Verbo regular: refrain - refrained- refrained

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could refrain
you could refrain
he could refrain
we could refrain
you could refrain
they could refrain 	I could be refraining
you could be refraining
he could be refraining
we could be refraining
you could be refraining
they could be refraining	I could have refrained
you could have refrained
he could have refrained
we could have refrained
you could have refrained
they could have refrained	I could have been refraining
you could have been refraining
he could have been refraining
we could have been refraining
you could have been refraining
they could have been refraining	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not refrain
you could not refrain
he could not refrain
we could not refrain
you could not refrain
they could not refrain 	I could not be refraining
you could not be refraining
he could not be refraining
we could not be refraining
you could not be refraining
they could not be refraining	I could not have refrained
you could not have refrained
he could not have refrained
we could not have refrained
you could not have refrained
they could not have refrained	I could not have been refraining
you could not have been refraining
he could not have been refraining
we could not have been refraining
you could not have been refraining
they could not have been refraining	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I refrain?
could you refrain?
could he refrain?
could we refrain?
could you refrain?
could they refrain? 	could I be refraining?
could you be refraining?
could he be refraining?
could we be refraining?
could you be refraining?
could they be refraining? 	could I have refrained?
could you have refrained?
could he have refrained?
could we have refrained?
could you have refrained?
could they have refrained? 	could I have been refraining?
could you have been refraining?
could he have been refraining?
could we have been refraining?
could you have been refraining?
could they have been refraining? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not refrain?
could you not refrain?
could he not refrain?
could we not refrain?
could you not refrain?
could they not refrain? 	could I not be refraining?
could you not be refraining?
could he not be refraining?
could we not be refraining?
could you not be refraining?
could they not be refraining? 	could I not have refrained?
could you not have refrained?
could he not have refrained?
could we not have refrained?
could you not have refrained?
could they not have refrained? 	could I not have been refraining?
could you not have been refraining?
could he not have been refraining?
could we not have been refraining?
could you not have been refraining?
could they not have been refraining?