could extirpate
Regular verb: extirpate - extirpated- extirpated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could extirpate
you could extirpate
he could extirpate
we could extirpate
you could extirpate
they could extirpate 	I could be extirpating
you could be extirpating
he could be extirpating
we could be extirpating
you could be extirpating
they could be extirpating	I could have extirpated
you could have extirpated
he could have extirpated
we could have extirpated
you could have extirpated
they could have extirpated	I could have been extirpating
you could have been extirpating
he could have been extirpating
we could have been extirpating
you could have been extirpating
they could have been extirpating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't extirpate
you couldn't extirpate
he couldn't extirpate
we couldn't extirpate
you couldn't extirpate
they couldn't extirpate 	I couldn't be extirpating
you couldn't be extirpating
he couldn't be extirpating
we couldn't be extirpating
you couldn't be extirpating
they couldn't be extirpating	I couldn't have extirpated
you couldn't have extirpated
he couldn't have extirpated
we couldn't have extirpated
you couldn't have extirpated
they couldn't have extirpated	I couldn't have been extirpating
you couldn't have been extirpating
he couldn't have been extirpating
we couldn't have been extirpating
you couldn't have been extirpating
they couldn't have been extirpating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I extirpate?
could you extirpate?
could he extirpate?
could we extirpate?
could you extirpate?
could they extirpate? 	could I be extirpating?
could you be extirpating?
could he be extirpating?
could we be extirpating?
could you be extirpating?
could they be extirpating? 	could I have extirpated?
could you have extirpated?
could he have extirpated?
could we have extirpated?
could you have extirpated?
could they have extirpated? 	could I have been extirpating?
could you have been extirpating?
could he have been extirpating?
could we have been extirpating?
could you have been extirpating?
could they have been extirpating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I extirpate?
couldn't you extirpate?
couldn't he extirpate?
couldn't we extirpate?
couldn't you extirpate?
couldn't they extirpate? 	couldn't I be extirpating?
couldn't you be extirpating?
couldn't he be extirpating?
couldn't we be extirpating?
couldn't you be extirpating?
couldn't they be extirpating? 	couldn't I have extirpated?
couldn't you have extirpated?
couldn't he have extirpated?
couldn't we have extirpated?
couldn't you have extirpated?
couldn't they have extirpated? 	couldn't I have been extirpating?
couldn't you have been extirpating?
couldn't he have been extirpating?
couldn't we have been extirpating?
couldn't you have been extirpating?
couldn't they have been extirpating?