could exhaust
Regular verb: exhaust - exhausted- exhausted

Affirmation 	
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I could exhaust
you could exhaust
she could exhaust
we could exhaust
you could exhaust
they could exhaust 	I could be exhausting
you could be exhausting
she could be exhausting
we could be exhausting
you could be exhausting
they could be exhausting	I could have exhausted
you could have exhausted
she could have exhausted
we could have exhausted
you could have exhausted
they could have exhausted	I could have been exhausting
you could have been exhausting
she could have been exhausting
we could have been exhausting
you could have been exhausting
they could have been exhausting	

Negation 	
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I could not exhaust
you could not exhaust
she could not exhaust
we could not exhaust
you could not exhaust
they could not exhaust 	I could not be exhausting
you could not be exhausting
she could not be exhausting
we could not be exhausting
you could not be exhausting
they could not be exhausting	I could not have exhausted
you could not have exhausted
she could not have exhausted
we could not have exhausted
you could not have exhausted
they could not have exhausted	I could not have been exhausting
you could not have been exhausting
she could not have been exhausting
we could not have been exhausting
you could not have been exhausting
they could not have been exhausting	

Interrogative form 	
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could I exhaust?
could you exhaust?
could she exhaust?
could we exhaust?
could you exhaust?
could they exhaust? 	could I be exhausting?
could you be exhausting?
could she be exhausting?
could we be exhausting?
could you be exhausting?
could they be exhausting? 	could I have exhausted?
could you have exhausted?
could she have exhausted?
could we have exhausted?
could you have exhausted?
could they have exhausted? 	could I have been exhausting?
could you have been exhausting?
could she have been exhausting?
could we have been exhausting?
could you have been exhausting?
could they have been exhausting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not exhaust?
could you not exhaust?
could she not exhaust?
could we not exhaust?
could you not exhaust?
could they not exhaust? 	could I not be exhausting?
could you not be exhausting?
could she not be exhausting?
could we not be exhausting?
could you not be exhausting?
could they not be exhausting? 	could I not have exhausted?
could you not have exhausted?
could she not have exhausted?
could we not have exhausted?
could you not have exhausted?
could they not have exhausted? 	could I not have been exhausting?
could you not have been exhausting?
could she not have been exhausting?
could we not have been exhausting?
could you not have been exhausting?
could they not have been exhausting?