I could groove you could groove he could groove we could groove you could groove they could groove
V-ing form
I could be grooving you could be grooving he could be grooving we could be grooving you could be grooving they could be grooving
Perfect
I could have grooved you could have grooved he 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 he could have been grooving we could have been grooving you could have been grooving they could have been grooving
Negation
Simple form
I couldn't groove you couldn't groove he couldn't groove we couldn't groove you couldn't groove they couldn't groove
V-ing form
I couldn't be grooving you couldn't be grooving he couldn't be grooving we couldn't be grooving you couldn't be grooving they couldn't be grooving
Perfect
I couldn't have grooved you couldn't have grooved he couldn't have grooved we couldn't have grooved you couldn't have grooved they couldn't have grooved
V-ing perfect
I couldn't have been grooving you couldn't have been grooving he couldn't have been grooving we couldn't have been grooving you couldn't have been grooving they couldn't have been grooving
Interrogative form
Simple form
could I groove? could you groove? could he groove? could we groove? could you groove? could they groove?
V-ing form
could I be grooving? could you be grooving? could he be grooving? could we be grooving? could you be grooving? could they be grooving?
Perfect
could I have grooved? could you have grooved? could he 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 he have been grooving? could we have been grooving? could you have been grooving? could they have been grooving?
Interro-negative form
Simple form
couldn't I groove? couldn't you groove? couldn't he groove? couldn't we groove? couldn't you groove? couldn't they groove?
V-ing form
couldn't I be grooving? couldn't you be grooving? couldn't he be grooving? couldn't we be grooving? couldn't you be grooving? couldn't they be grooving?
Perfect
couldn't I have grooved? couldn't you have grooved? couldn't he have grooved? couldn't we have grooved? couldn't you have grooved? couldn't they have grooved?
V-ing perfect
couldn't I have been grooving? couldn't you have been grooving? couldn't he have been grooving? couldn't we have been grooving? couldn't you have been grooving? couldn't they have been grooving?