English verb conjugation
COULD BRACKET

Regular verb: bracket - bracketed - bracketed

Affirmation

Simple form	V-ing form
I could bracket you could bracket she could bracket we could bracket you could bracket they could bracket	I could be bracketing you could be bracketing she 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 she 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 she 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 couldn't bracket you couldn't bracket she couldn't bracket we couldn't bracket you couldn't bracket they couldn't bracket	I couldn't be bracketing you couldn't be bracketing she couldn't be bracketing we couldn't be bracketing you couldn't be bracketing they couldn't be bracketing
Perfect	V-ing perfect
I couldn't have bracketed you couldn't have bracketed she couldn't have bracketed we couldn't have bracketed you couldn't have bracketed they couldn't have bracketed	I couldn't have been bracketing you couldn't have been bracketing she couldn't have been bracketing we couldn't have been bracketing you couldn't have been bracketing they couldn't have been bracketing

Interrogative form

Simple form	V-ing form
could I bracket? could you bracket? could she bracket? could we bracket? could you bracket? could they bracket?	could I be bracketing? could you be bracketing? could she 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 she 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 she 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
couldn't I bracket? couldn't you bracket? couldn't she bracket? couldn't we bracket? couldn't you bracket? couldn't they bracket?	couldn't I be bracketing? couldn't you be bracketing? couldn't she be bracketing? couldn't we be bracketing? couldn't you be bracketing? couldn't they be bracketing?
Perfect	V-ing perfect
couldn't I have bracketed? couldn't you have bracketed? couldn't she have bracketed? couldn't we have bracketed? couldn't you have bracketed? couldn't they have bracketed?	couldn't I have been bracketing? couldn't you have been bracketing? couldn't she have been bracketing? couldn't we have been bracketing? couldn't you have been bracketing? couldn't they have been bracketing?