I could forfeit you could forfeit she could forfeit we could forfeit you could forfeit they could forfeit
V-ing form
I could be forfeiting you could be forfeiting she could be forfeiting we could be forfeiting you could be forfeiting they could be forfeiting
Perfect
I could have forfeited you could have forfeited she could have forfeited we could have forfeited you could have forfeited they could have forfeited
V-ing perfect
I could have been forfeiting you could have been forfeiting she could have been forfeiting we could have been forfeiting you could have been forfeiting they could have been forfeiting
Negation
Simple form
I couldn't forfeit you couldn't forfeit she couldn't forfeit we couldn't forfeit you couldn't forfeit they couldn't forfeit
V-ing form
I couldn't be forfeiting you couldn't be forfeiting she couldn't be forfeiting we couldn't be forfeiting you couldn't be forfeiting they couldn't be forfeiting
Perfect
I couldn't have forfeited you couldn't have forfeited she couldn't have forfeited we couldn't have forfeited you couldn't have forfeited they couldn't have forfeited
V-ing perfect
I couldn't have been forfeiting you couldn't have been forfeiting she couldn't have been forfeiting we couldn't have been forfeiting you couldn't have been forfeiting they couldn't have been forfeiting
Interrogative form
Simple form
could I forfeit? could you forfeit? could she forfeit? could we forfeit? could you forfeit? could they forfeit?
V-ing form
could I be forfeiting? could you be forfeiting? could she be forfeiting? could we be forfeiting? could you be forfeiting? could they be forfeiting?
Perfect
could I have forfeited? could you have forfeited? could she have forfeited? could we have forfeited? could you have forfeited? could they have forfeited?
V-ing perfect
could I have been forfeiting? could you have been forfeiting? could she have been forfeiting? could we have been forfeiting? could you have been forfeiting? could they have been forfeiting?
Interro-negative form
Simple form
couldn't I forfeit? couldn't you forfeit? couldn't she forfeit? couldn't we forfeit? couldn't you forfeit? couldn't they forfeit?
V-ing form
couldn't I be forfeiting? couldn't you be forfeiting? couldn't she be forfeiting? couldn't we be forfeiting? couldn't you be forfeiting? couldn't they be forfeiting?
Perfect
couldn't I have forfeited? couldn't you have forfeited? couldn't she have forfeited? couldn't we have forfeited? couldn't you have forfeited? couldn't they have forfeited?
V-ing perfect
couldn't I have been forfeiting? couldn't you have been forfeiting? couldn't she have been forfeiting? couldn't we have been forfeiting? couldn't you have been forfeiting? couldn't they have been forfeiting?