I could defame you could defame she could defame we could defame you could defame they could defame
V-ing form
I could be defaming you could be defaming she could be defaming we could be defaming you could be defaming they could be defaming
Perfect
I could have defamed you could have defamed she 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 she 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 she 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 she 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 she 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 she 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 she defame? could we defame? could you defame? could they defame?
V-ing form
could I be defaming? could you be defaming? could she be defaming? could we be defaming? could you be defaming? could they be defaming?
Perfect
could I have defamed? could you have defamed? could she 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 she 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 she 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 she 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 she 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 she have been defaming? couldn't we have been defaming? couldn't you have been defaming? couldn't they have been defaming?