could defame
Regular verb: defame - defamed- defamed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could defame
you could defame
he could defame
we could defame
you could defame
they could defame 	I could be defaming
you could be defaming
he could be defaming
we could be defaming
you could be defaming
they could be defaming	I could have defamed
you could have defamed
he could have defamed
we could have defamed
you could have defamed
they could have defamed	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 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't defame
you couldn't defame
he couldn't defame
we couldn't defame
you couldn't defame
they couldn't defame 	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	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	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 	V-ing form 	Perfect 	V-ing perfect 	
could I defame?
could you defame?
could he defame?
could we defame?
could you defame?
could they defame? 	could I be defaming?
could you be defaming?
could he be defaming?
could we be defaming?
could you be defaming?
could they be defaming? 	could I have defamed?
could you have defamed?
could he have defamed?
could we have defamed?
could you have defamed?
could they have defamed? 	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 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I defame?
couldn't you defame?
couldn't he defame?
couldn't we defame?
couldn't you defame?
couldn't they defame? 	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? 	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? 	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?