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