I could groove you could groove she could groove we could groove you could groove they could groove
V-ing form
I could be grooving you could be grooving she could be grooving we could be grooving you could be grooving they could be grooving
Perfect
I could have grooved you could have grooved she could have grooved we could have grooved you could have grooved they could have grooved
V-ing perfect
I could have been grooving you could have been grooving she could have been grooving we could have been grooving you could have been grooving they could have been grooving
Negation
Simple form
I could not groove you could not groove she could not groove we could not groove you could not groove they could not groove
V-ing form
I could not be grooving you could not be grooving she could not be grooving we could not be grooving you could not be grooving they could not be grooving
Perfect
I could not have grooved you could not have grooved she could not have grooved we could not have grooved you could not have grooved they could not have grooved
V-ing perfect
I could not have been grooving you could not have been grooving she could not have been grooving we could not have been grooving you could not have been grooving they could not have been grooving
Interrogative form
Simple form
could I groove? could you groove? could she groove? could we groove? could you groove? could they groove?
V-ing form
could I be grooving? could you be grooving? could she be grooving? could we be grooving? could you be grooving? could they be grooving?
Perfect
could I have grooved? could you have grooved? could she have grooved? could we have grooved? could you have grooved? could they have grooved?
V-ing perfect
could I have been grooving? could you have been grooving? could she have been grooving? could we have been grooving? could you have been grooving? could they have been grooving?
Interro-negative form
Simple form
could I not groove? could you not groove? could she not groove? could we not groove? could you not groove? could they not groove?
V-ing form
could I not be grooving? could you not be grooving? could she not be grooving? could we not be grooving? could you not be grooving? could they not be grooving?
Perfect
could I not have grooved? could you not have grooved? could she not have grooved? could we not have grooved? could you not have grooved? could they not have grooved?
V-ing perfect
could I not have been grooving? could you not have been grooving? could she not have been grooving? could we not have been grooving? could you not have been grooving? could they not have been grooving?