English verb conjugation
COULD BRACKET

Regular verb: bracket - bracketed - bracketed

Affirmation

Simple form	V-ing form
I could bracket you could bracket he could bracket we could bracket you could bracket they could bracket	I could be bracketing you could be bracketing he could be bracketing we could be bracketing you could be bracketing they could be bracketing
Perfect	V-ing perfect
I could have bracketed you could have bracketed he could have bracketed we could have bracketed you could have bracketed they could have bracketed	I could have been bracketing you could have been bracketing he could have been bracketing we could have been bracketing you could have been bracketing they could have been bracketing

Negation

Simple form	V-ing form
I could not bracket you could not bracket he could not bracket we could not bracket you could not bracket they could not bracket	I could not be bracketing you could not be bracketing he could not be bracketing we could not be bracketing you could not be bracketing they could not be bracketing
Perfect	V-ing perfect
I could not have bracketed you could not have bracketed he could not have bracketed we could not have bracketed you could not have bracketed they could not have bracketed	I could not have been bracketing you could not have been bracketing he could not have been bracketing we could not have been bracketing you could not have been bracketing they could not have been bracketing

Interrogative form

Simple form	V-ing form
could I bracket? could you bracket? could he bracket? could we bracket? could you bracket? could they bracket?	could I be bracketing? could you be bracketing? could he be bracketing? could we be bracketing? could you be bracketing? could they be bracketing?
Perfect	V-ing perfect
could I have bracketed? could you have bracketed? could he have bracketed? could we have bracketed? could you have bracketed? could they have bracketed?	could I have been bracketing? could you have been bracketing? could he have been bracketing? could we have been bracketing? could you have been bracketing? could they have been bracketing?

Interro-negative form

Simple form	V-ing form
could I not bracket? could you not bracket? could he not bracket? could we not bracket? could you not bracket? could they not bracket?	could I not be bracketing? could you not be bracketing? could he not be bracketing? could we not be bracketing? could you not be bracketing? could they not be bracketing?
Perfect	V-ing perfect
could I not have bracketed? could you not have bracketed? could he not have bracketed? could we not have bracketed? could you not have bracketed? could they not have bracketed?	could I not have been bracketing? could you not have been bracketing? could he not have been bracketing? could we not have been bracketing? could you not have been bracketing? could they not have been bracketing?