English verb conjugation
COULD BLAB

Regular verb: blab - blabbed - blabbed

Affirmation

Simple form	V-ing form
I could blab you could blab he could blab we could blab you could blab they could blab	I could be blabbing you could be blabbing he could be blabbing we could be blabbing you could be blabbing they could be blabbing
Perfect	V-ing perfect
I could have blabbed you could have blabbed he could have blabbed we could have blabbed you could have blabbed they could have blabbed	I could have been blabbing you could have been blabbing he could have been blabbing we could have been blabbing you could have been blabbing they could have been blabbing

Negation

Simple form	V-ing form
I couldn't blab you couldn't blab he couldn't blab we couldn't blab you couldn't blab they couldn't blab	I couldn't be blabbing you couldn't be blabbing he couldn't be blabbing we couldn't be blabbing you couldn't be blabbing they couldn't be blabbing
Perfect	V-ing perfect
I couldn't have blabbed you couldn't have blabbed he couldn't have blabbed we couldn't have blabbed you couldn't have blabbed they couldn't have blabbed	I couldn't have been blabbing you couldn't have been blabbing he couldn't have been blabbing we couldn't have been blabbing you couldn't have been blabbing they couldn't have been blabbing

Interrogative form

Simple form	V-ing form
could I blab? could you blab? could he blab? could we blab? could you blab? could they blab?	could I be blabbing? could you be blabbing? could he be blabbing? could we be blabbing? could you be blabbing? could they be blabbing?
Perfect	V-ing perfect
could I have blabbed? could you have blabbed? could he have blabbed? could we have blabbed? could you have blabbed? could they have blabbed?	could I have been blabbing? could you have been blabbing? could he have been blabbing? could we have been blabbing? could you have been blabbing? could they have been blabbing?

Interro-negative form

Simple form	V-ing form
couldn't I blab? couldn't you blab? couldn't he blab? couldn't we blab? couldn't you blab? couldn't they blab?	couldn't I be blabbing? couldn't you be blabbing? couldn't he be blabbing? couldn't we be blabbing? couldn't you be blabbing? couldn't they be blabbing?
Perfect	V-ing perfect
couldn't I have blabbed? couldn't you have blabbed? couldn't he have blabbed? couldn't we have blabbed? couldn't you have blabbed? couldn't they have blabbed?	couldn't I have been blabbing? couldn't you have been blabbing? couldn't he have been blabbing? couldn't we have been blabbing? couldn't you have been blabbing? couldn't they have been blabbing?