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