could defect
Regular verb: defect - defected- defected

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could defect
you could defect
he could defect
we could defect
you could defect
they could defect 	I could be defecting
you could be defecting
he could be defecting
we could be defecting
you could be defecting
they could be defecting	I could have defected
you could have defected
he could have defected
we could have defected
you could have defected
they could have defected	I could have been defecting
you could have been defecting
he could have been defecting
we could have been defecting
you could have been defecting
they could have been defecting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't defect
you couldn't defect
he couldn't defect
we couldn't defect
you couldn't defect
they couldn't defect 	I couldn't be defecting
you couldn't be defecting
he couldn't be defecting
we couldn't be defecting
you couldn't be defecting
they couldn't be defecting	I couldn't have defected
you couldn't have defected
he couldn't have defected
we couldn't have defected
you couldn't have defected
they couldn't have defected	I couldn't have been defecting
you couldn't have been defecting
he couldn't have been defecting
we couldn't have been defecting
you couldn't have been defecting
they couldn't have been defecting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I defect?
could you defect?
could he defect?
could we defect?
could you defect?
could they defect? 	could I be defecting?
could you be defecting?
could he be defecting?
could we be defecting?
could you be defecting?
could they be defecting? 	could I have defected?
could you have defected?
could he have defected?
could we have defected?
could you have defected?
could they have defected? 	could I have been defecting?
could you have been defecting?
could he have been defecting?
could we have been defecting?
could you have been defecting?
could they have been defecting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I defect?
couldn't you defect?
couldn't he defect?
couldn't we defect?
couldn't you defect?
couldn't they defect? 	couldn't I be defecting?
couldn't you be defecting?
couldn't he be defecting?
couldn't we be defecting?
couldn't you be defecting?
couldn't they be defecting? 	couldn't I have defected?
couldn't you have defected?
couldn't he have defected?
couldn't we have defected?
couldn't you have defected?
couldn't they have defected? 	couldn't I have been defecting?
couldn't you have been defecting?
couldn't he have been defecting?
couldn't we have been defecting?
couldn't you have been defecting?
couldn't they have been defecting?