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