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 couldn't blush you couldn't blush he couldn't blush we couldn't blush you couldn't blush they couldn't blush	I couldn't be blushing you couldn't be blushing he couldn't be blushing we couldn't be blushing you couldn't be blushing they couldn't be blushing
Perfect	V-ing perfect
I couldn't have blushed you couldn't have blushed he couldn't have blushed we couldn't have blushed you couldn't have blushed they couldn't have blushed	I couldn't have been blushing you couldn't have been blushing he couldn't have been blushing we couldn't have been blushing you couldn't have been blushing they couldn't 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
couldn't I blush? couldn't you blush? couldn't he blush? couldn't we blush? couldn't you blush? couldn't they blush?	couldn't I be blushing? couldn't you be blushing? couldn't he be blushing? couldn't we be blushing? couldn't you be blushing? couldn't they be blushing?
Perfect	V-ing perfect
couldn't I have blushed? couldn't you have blushed? couldn't he have blushed? couldn't we have blushed? couldn't you have blushed? couldn't they have blushed?	couldn't I have been blushing? couldn't you have been blushing? couldn't he have been blushing? couldn't we have been blushing? couldn't you have been blushing? couldn't they have been blushing?