I could slander you could slander she could slander we could slander you could slander they could slander
V-ing form
I could be slandering you could be slandering she could be slandering we could be slandering you could be slandering they could be slandering
Perfect
I could have slandered you could have slandered she could have slandered we could have slandered you could have slandered they could have slandered
V-ing perfect
I could have been slandering you could have been slandering she could have been slandering we could have been slandering you could have been slandering they could have been slandering
Negation
Simple form
I couldn't slander you couldn't slander she couldn't slander we couldn't slander you couldn't slander they couldn't slander
V-ing form
I couldn't be slandering you couldn't be slandering she couldn't be slandering we couldn't be slandering you couldn't be slandering they couldn't be slandering
Perfect
I couldn't have slandered you couldn't have slandered she couldn't have slandered we couldn't have slandered you couldn't have slandered they couldn't have slandered
V-ing perfect
I couldn't have been slandering you couldn't have been slandering she couldn't have been slandering we couldn't have been slandering you couldn't have been slandering they couldn't have been slandering
Interrogative form
Simple form
could I slander? could you slander? could she slander? could we slander? could you slander? could they slander?
V-ing form
could I be slandering? could you be slandering? could she be slandering? could we be slandering? could you be slandering? could they be slandering?
Perfect
could I have slandered? could you have slandered? could she have slandered? could we have slandered? could you have slandered? could they have slandered?
V-ing perfect
could I have been slandering? could you have been slandering? could she have been slandering? could we have been slandering? could you have been slandering? could they have been slandering?
Interro-negative form
Simple form
couldn't I slander? couldn't you slander? couldn't she slander? couldn't we slander? couldn't you slander? couldn't they slander?
V-ing form
couldn't I be slandering? couldn't you be slandering? couldn't she be slandering? couldn't we be slandering? couldn't you be slandering? couldn't they be slandering?
Perfect
couldn't I have slandered? couldn't you have slandered? couldn't she have slandered? couldn't we have slandered? couldn't you have slandered? couldn't they have slandered?
V-ing perfect
couldn't I have been slandering? couldn't you have been slandering? couldn't she have been slandering? couldn't we have been slandering? couldn't you have been slandering? couldn't they have been slandering?