could extenuate
Verbo regular: extenuate - extenuated- extenuated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could extenuate
you could extenuate
he could extenuate
we could extenuate
you could extenuate
they could extenuate 	I could be extenuating
you could be extenuating
he could be extenuating
we could be extenuating
you could be extenuating
they could be extenuating	I could have extenuated
you could have extenuated
he could have extenuated
we could have extenuated
you could have extenuated
they could have extenuated	I could have been extenuating
you could have been extenuating
he could have been extenuating
we could have been extenuating
you could have been extenuating
they could have been extenuating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't extenuate
you couldn't extenuate
he couldn't extenuate
we couldn't extenuate
you couldn't extenuate
they couldn't extenuate 	I couldn't be extenuating
you couldn't be extenuating
he couldn't be extenuating
we couldn't be extenuating
you couldn't be extenuating
they couldn't be extenuating	I couldn't have extenuated
you couldn't have extenuated
he couldn't have extenuated
we couldn't have extenuated
you couldn't have extenuated
they couldn't have extenuated	I couldn't have been extenuating
you couldn't have been extenuating
he couldn't have been extenuating
we couldn't have been extenuating
you couldn't have been extenuating
they couldn't have been extenuating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I extenuate?
could you extenuate?
could he extenuate?
could we extenuate?
could you extenuate?
could they extenuate? 	could I be extenuating?
could you be extenuating?
could he be extenuating?
could we be extenuating?
could you be extenuating?
could they be extenuating? 	could I have extenuated?
could you have extenuated?
could he have extenuated?
could we have extenuated?
could you have extenuated?
could they have extenuated? 	could I have been extenuating?
could you have been extenuating?
could he have been extenuating?
could we have been extenuating?
could you have been extenuating?
could they have been extenuating? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I extenuate?
couldn't you extenuate?
couldn't he extenuate?
couldn't we extenuate?
couldn't you extenuate?
couldn't they extenuate? 	couldn't I be extenuating?
couldn't you be extenuating?
couldn't he be extenuating?
couldn't we be extenuating?
couldn't you be extenuating?
couldn't they be extenuating? 	couldn't I have extenuated?
couldn't you have extenuated?
couldn't he have extenuated?
couldn't we have extenuated?
couldn't you have extenuated?
couldn't they have extenuated? 	couldn't I have been extenuating?
couldn't you have been extenuating?
couldn't he have been extenuating?
couldn't we have been extenuating?
couldn't you have been extenuating?
couldn't they have been extenuating?