English verb conjugation
COULD BLUSH

Regular verb: blush - blushed - blushed

Affirmation

Simple form	V-ing form
I could blush you could blush he could blush we could blush you could blush they could blush	I could be blushing you could be blushing he could be blushing we could be blushing you could be blushing they could be blushing
Perfect	V-ing perfect
I could have blushed you could have blushed he could have blushed we could have blushed you could have blushed they could have blushed	I could have been blushing you could have been blushing he could have been blushing we could have been blushing you could have been blushing they could have been blushing

Negation

Simple form	V-ing form
I could not blush you could not blush he could not blush we could not blush you could not blush they could not blush	I could not be blushing you could not be blushing he could not be blushing we could not be blushing you could not be blushing they could not be blushing
Perfect	V-ing perfect
I could not have blushed you could not have blushed he could not have blushed we could not have blushed you could not have blushed they could not have blushed	I could not have been blushing you could not have been blushing he could not have been blushing we could not have been blushing you could not have been blushing they could not have been blushing

Interrogative form

Simple form	V-ing form
could I blush? could you blush? could he blush? could we blush? could you blush? could they blush?	could I be blushing? could you be blushing? could he be blushing? could we be blushing? could you be blushing? could they be blushing?
Perfect	V-ing perfect
could I have blushed? could you have blushed? could he have blushed? could we have blushed? could you have blushed? could they have blushed?	could I have been blushing? could you have been blushing? could he have been blushing? could we have been blushing? could you have been blushing? could they have been blushing?

Interro-negative form

Simple form	V-ing form
could I not blush? could you not blush? could he not blush? could we not blush? could you not blush? could they not blush?	could I not be blushing? could you not be blushing? could he not be blushing? could we not be blushing? could you not be blushing? could they not be blushing?
Perfect	V-ing perfect
could I not have blushed? could you not have blushed? could he not have blushed? could we not have blushed? could you not have blushed? could they not have blushed?	could I not have been blushing? could you not have been blushing? could he not have been blushing? could we not have been blushing? could you not have been blushing? could they not have been blushing?