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