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