Conjugación del verbo inglés
COULD REFRAIN

Verbo regular: refrain - refrained - refrained

Afirmación

Forma simple	Forma con V-ing
I could refrain you could refrain she could refrain we could refrain you could refrain they could refrain	I could be refraining you could be refraining she could be refraining we could be refraining you could be refraining they could be refraining
Perfecto	Perfecto con V-ing
I could have refrained you could have refrained she 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 she could have been refraining we could have been refraining you could have been refraining they could have been refraining

Negación

Forma simple	Forma con V-ing
I couldn't refrain you couldn't refrain she couldn't refrain we couldn't refrain you couldn't refrain they couldn't refrain	I couldn't be refraining you couldn't be refraining she couldn't be refraining we couldn't be refraining you couldn't be refraining they couldn't be refraining
Perfecto	Perfecto con V-ing
I couldn't have refrained you couldn't have refrained she couldn't have refrained we couldn't have refrained you couldn't have refrained they couldn't have refrained	I couldn't have been refraining you couldn't have been refraining she couldn't have been refraining we couldn't have been refraining you couldn't have been refraining they couldn't have been refraining

Forma interrogativa

Forma simple	Forma con V-ing
could I refrain? could you refrain? could she refrain? could we refrain? could you refrain? could they refrain?	could I be refraining? could you be refraining? could she be refraining? could we be refraining? could you be refraining? could they be refraining?
Perfecto	Perfecto con V-ing
could I have refrained? could you have refrained? could she 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 she have been refraining? could we have been refraining? could you have been refraining? could they have been refraining?

Forma interro-negativa

Forma simple	Forma con V-ing
couldn't I refrain? couldn't you refrain? couldn't she refrain? couldn't we refrain? couldn't you refrain? couldn't they refrain?	couldn't I be refraining? couldn't you be refraining? couldn't she be refraining? couldn't we be refraining? couldn't you be refraining? couldn't they be refraining?
Perfecto	Perfecto con V-ing
couldn't I have refrained? couldn't you have refrained? couldn't she have refrained? couldn't we have refrained? couldn't you have refrained? couldn't they have refrained?	couldn't I have been refraining? couldn't you have been refraining? couldn't she have been refraining? couldn't we have been refraining? couldn't you have been refraining? couldn't they have been refraining?