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