can defog
Regular verb: defog - defoged- defoged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can defog
you can defog
he can defog
we can defog
you can defog
they can defog 	I can be defoging
you can be defoging
he can be defoging
we can be defoging
you can be defoging
they can be defoging	I can have defoged
you can have defoged
he can have defoged
we can have defoged
you can have defoged
they can have defoged	I can have been defoging
you can have been defoging
he can have been defoging
we can have been defoging
you can have been defoging
they can have been defoging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot defog
you cannot defog
he cannot defog
we cannot defog
you cannot defog
they cannot defog 	I cannot be defoging
you cannot be defoging
he cannot be defoging
we cannot be defoging
you cannot be defoging
they cannot be defoging	I cannot have defoged
you cannot have defoged
he cannot have defoged
we cannot have defoged
you cannot have defoged
they cannot have defoged	I cannot have been defoging
you cannot have been defoging
he cannot have been defoging
we cannot have been defoging
you cannot have been defoging
they cannot have been defoging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I defog?
can you defog?
can he defog?
can we defog?
can you defog?
can they defog? 	can I be defoging?
can you be defoging?
can he be defoging?
can we be defoging?
can you be defoging?
can they be defoging? 	can I have defoged?
can you have defoged?
can he have defoged?
can we have defoged?
can you have defoged?
can they have defoged? 	can I have been defoging?
can you have been defoging?
can he have been defoging?
can we have been defoging?
can you have been defoging?
can they have been defoging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not defog?
can you not defog?
can he not defog?
can we not defog?
can you not defog?
can they not defog? 	can I not be defoging?
can you not be defoging?
can he not be defoging?
can we not be defoging?
can you not be defoging?
can they not be defoging? 	can I not have defoged?
can you not have defoged?
can he not have defoged?
can we not have defoged?
can you not have defoged?
can they not have defoged? 	can I not have been defoging?
can you not have been defoging?
can he not have been defoging?
can we not have been defoging?
can you not have been defoging?
can they not have been defoging?