could terraform
Verbo regular: terraform - terraformed- terraformed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could terraform
you could terraform
he could terraform
we could terraform
you could terraform
they could terraform 	I could be terraforming
you could be terraforming
he could be terraforming
we could be terraforming
you could be terraforming
they could be terraforming	I could have terraformed
you could have terraformed
he could have terraformed
we could have terraformed
you could have terraformed
they could have terraformed	I could have been terraforming
you could have been terraforming
he could have been terraforming
we could have been terraforming
you could have been terraforming
they could have been terraforming	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not terraform
you could not terraform
he could not terraform
we could not terraform
you could not terraform
they could not terraform 	I could not be terraforming
you could not be terraforming
he could not be terraforming
we could not be terraforming
you could not be terraforming
they could not be terraforming	I could not have terraformed
you could not have terraformed
he could not have terraformed
we could not have terraformed
you could not have terraformed
they could not have terraformed	I could not have been terraforming
you could not have been terraforming
he could not have been terraforming
we could not have been terraforming
you could not have been terraforming
they could not have been terraforming	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I terraform?
could you terraform?
could he terraform?
could we terraform?
could you terraform?
could they terraform? 	could I be terraforming?
could you be terraforming?
could he be terraforming?
could we be terraforming?
could you be terraforming?
could they be terraforming? 	could I have terraformed?
could you have terraformed?
could he have terraformed?
could we have terraformed?
could you have terraformed?
could they have terraformed? 	could I have been terraforming?
could you have been terraforming?
could he have been terraforming?
could we have been terraforming?
could you have been terraforming?
could they have been terraforming? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not terraform?
could you not terraform?
could he not terraform?
could we not terraform?
could you not terraform?
could they not terraform? 	could I not be terraforming?
could you not be terraforming?
could he not be terraforming?
could we not be terraforming?
could you not be terraforming?
could they not be terraforming? 	could I not have terraformed?
could you not have terraformed?
could he not have terraformed?
could we not have terraformed?
could you not have terraformed?
could they not have terraformed? 	could I not have been terraforming?
could you not have been terraforming?
could he not have been terraforming?
could we not have been terraforming?
could you not have been terraforming?
could they not have been terraforming?