could evolve
Verbo regular: evolve - evolved- evolved

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could evolve
you could evolve
he could evolve
we could evolve
you could evolve
they could evolve 	I could be evolving
you could be evolving
he could be evolving
we could be evolving
you could be evolving
they could be evolving	I could have evolved
you could have evolved
he could have evolved
we could have evolved
you could have evolved
they could have evolved	I could have been evolving
you could have been evolving
he could have been evolving
we could have been evolving
you could have been evolving
they could have been evolving	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't evolve
you couldn't evolve
he couldn't evolve
we couldn't evolve
you couldn't evolve
they couldn't evolve 	I couldn't be evolving
you couldn't be evolving
he couldn't be evolving
we couldn't be evolving
you couldn't be evolving
they couldn't be evolving	I couldn't have evolved
you couldn't have evolved
he couldn't have evolved
we couldn't have evolved
you couldn't have evolved
they couldn't have evolved	I couldn't have been evolving
you couldn't have been evolving
he couldn't have been evolving
we couldn't have been evolving
you couldn't have been evolving
they couldn't have been evolving	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I evolve?
could you evolve?
could he evolve?
could we evolve?
could you evolve?
could they evolve? 	could I be evolving?
could you be evolving?
could he be evolving?
could we be evolving?
could you be evolving?
could they be evolving? 	could I have evolved?
could you have evolved?
could he have evolved?
could we have evolved?
could you have evolved?
could they have evolved? 	could I have been evolving?
could you have been evolving?
could he have been evolving?
could we have been evolving?
could you have been evolving?
could they have been evolving? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I evolve?
couldn't you evolve?
couldn't he evolve?
couldn't we evolve?
couldn't you evolve?
couldn't they evolve? 	couldn't I be evolving?
couldn't you be evolving?
couldn't he be evolving?
couldn't we be evolving?
couldn't you be evolving?
couldn't they be evolving? 	couldn't I have evolved?
couldn't you have evolved?
couldn't he have evolved?
couldn't we have evolved?
couldn't you have evolved?
couldn't they have evolved? 	couldn't I have been evolving?
couldn't you have been evolving?
couldn't he have been evolving?
couldn't we have been evolving?
couldn't you have been evolving?
couldn't they have been evolving?