could defuse
Regular verb: defuse - defused- defused

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could defuse
you could defuse
she could defuse
we could defuse
you could defuse
they could defuse 	I could be defusing
you could be defusing
she could be defusing
we could be defusing
you could be defusing
they could be defusing	I could have defused
you could have defused
she could have defused
we could have defused
you could have defused
they could have defused	I could have been defusing
you could have been defusing
she could have been defusing
we could have been defusing
you could have been defusing
they could have been defusing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't defuse
you couldn't defuse
she couldn't defuse
we couldn't defuse
you couldn't defuse
they couldn't defuse 	I couldn't be defusing
you couldn't be defusing
she couldn't be defusing
we couldn't be defusing
you couldn't be defusing
they couldn't be defusing	I couldn't have defused
you couldn't have defused
she couldn't have defused
we couldn't have defused
you couldn't have defused
they couldn't have defused	I couldn't have been defusing
you couldn't have been defusing
she couldn't have been defusing
we couldn't have been defusing
you couldn't have been defusing
they couldn't have been defusing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I defuse?
could you defuse?
could she defuse?
could we defuse?
could you defuse?
could they defuse? 	could I be defusing?
could you be defusing?
could she be defusing?
could we be defusing?
could you be defusing?
could they be defusing? 	could I have defused?
could you have defused?
could she have defused?
could we have defused?
could you have defused?
could they have defused? 	could I have been defusing?
could you have been defusing?
could she have been defusing?
could we have been defusing?
could you have been defusing?
could they have been defusing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I defuse?
couldn't you defuse?
couldn't she defuse?
couldn't we defuse?
couldn't you defuse?
couldn't they defuse? 	couldn't I be defusing?
couldn't you be defusing?
couldn't she be defusing?
couldn't we be defusing?
couldn't you be defusing?
couldn't they be defusing? 	couldn't I have defused?
couldn't you have defused?
couldn't she have defused?
couldn't we have defused?
couldn't you have defused?
couldn't they have defused? 	couldn't I have been defusing?
couldn't you have been defusing?
couldn't she have been defusing?
couldn't we have been defusing?
couldn't you have been defusing?
couldn't they have been defusing?