could impoverish
Regular verb: impoverish - impoverished- impoverished

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could impoverish
you could impoverish
she could impoverish
we could impoverish
you could impoverish
they could impoverish 	I could be impoverishing
you could be impoverishing
she could be impoverishing
we could be impoverishing
you could be impoverishing
they could be impoverishing	I could have impoverished
you could have impoverished
she could have impoverished
we could have impoverished
you could have impoverished
they could have impoverished	I could have been impoverishing
you could have been impoverishing
she could have been impoverishing
we could have been impoverishing
you could have been impoverishing
they could have been impoverishing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't impoverish
you couldn't impoverish
she couldn't impoverish
we couldn't impoverish
you couldn't impoverish
they couldn't impoverish 	I couldn't be impoverishing
you couldn't be impoverishing
she couldn't be impoverishing
we couldn't be impoverishing
you couldn't be impoverishing
they couldn't be impoverishing	I couldn't have impoverished
you couldn't have impoverished
she couldn't have impoverished
we couldn't have impoverished
you couldn't have impoverished
they couldn't have impoverished	I couldn't have been impoverishing
you couldn't have been impoverishing
she couldn't have been impoverishing
we couldn't have been impoverishing
you couldn't have been impoverishing
they couldn't have been impoverishing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I impoverish?
could you impoverish?
could she impoverish?
could we impoverish?
could you impoverish?
could they impoverish? 	could I be impoverishing?
could you be impoverishing?
could she be impoverishing?
could we be impoverishing?
could you be impoverishing?
could they be impoverishing? 	could I have impoverished?
could you have impoverished?
could she have impoverished?
could we have impoverished?
could you have impoverished?
could they have impoverished? 	could I have been impoverishing?
could you have been impoverishing?
could she have been impoverishing?
could we have been impoverishing?
could you have been impoverishing?
could they have been impoverishing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I impoverish?
couldn't you impoverish?
couldn't she impoverish?
couldn't we impoverish?
couldn't you impoverish?
couldn't they impoverish? 	couldn't I be impoverishing?
couldn't you be impoverishing?
couldn't she be impoverishing?
couldn't we be impoverishing?
couldn't you be impoverishing?
couldn't they be impoverishing? 	couldn't I have impoverished?
couldn't you have impoverished?
couldn't she have impoverished?
couldn't we have impoverished?
couldn't you have impoverished?
couldn't they have impoverished? 	couldn't I have been impoverishing?
couldn't you have been impoverishing?
couldn't she have been impoverishing?
couldn't we have been impoverishing?
couldn't you have been impoverishing?
couldn't they have been impoverishing?