could purge
Regular verb: purge - purged- purged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could purge
you could purge
he could purge
we could purge
you could purge
they could purge 	I could be purging
you could be purging
he could be purging
we could be purging
you could be purging
they could be purging	I could have purged
you could have purged
he could have purged
we could have purged
you could have purged
they could have purged	I could have been purging
you could have been purging
he could have been purging
we could have been purging
you could have been purging
they could have been purging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not purge
you could not purge
he could not purge
we could not purge
you could not purge
they could not purge 	I could not be purging
you could not be purging
he could not be purging
we could not be purging
you could not be purging
they could not be purging	I could not have purged
you could not have purged
he could not have purged
we could not have purged
you could not have purged
they could not have purged	I could not have been purging
you could not have been purging
he could not have been purging
we could not have been purging
you could not have been purging
they could not have been purging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I purge?
could you purge?
could he purge?
could we purge?
could you purge?
could they purge? 	could I be purging?
could you be purging?
could he be purging?
could we be purging?
could you be purging?
could they be purging? 	could I have purged?
could you have purged?
could he have purged?
could we have purged?
could you have purged?
could they have purged? 	could I have been purging?
could you have been purging?
could he have been purging?
could we have been purging?
could you have been purging?
could they have been purging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not purge?
could you not purge?
could he not purge?
could we not purge?
could you not purge?
could they not purge? 	could I not be purging?
could you not be purging?
could he not be purging?
could we not be purging?
could you not be purging?
could they not be purging? 	could I not have purged?
could you not have purged?
could he not have purged?
could we not have purged?
could you not have purged?
could they not have purged? 	could I not have been purging?
could you not have been purging?
could he not have been purging?
could we not have been purging?
could you not have been purging?
could they not have been purging?