English verb conjugation
COULD REFRAIN

Regular verb: refrain - refrained - refrained

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Negation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?

Interro-negative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?