could terraform
Verbe régulier : terraform - terraformed- terraformed

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en 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	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't terraform
you couldn't terraform
he couldn't terraform
we couldn't terraform
you couldn't terraform
they couldn't terraform 	I couldn't be terraforming
you couldn't be terraforming
he couldn't be terraforming
we couldn't be terraforming
you couldn't be terraforming
they couldn't be terraforming	I couldn't have terraformed
you couldn't have terraformed
he couldn't have terraformed
we couldn't have terraformed
you couldn't have terraformed
they couldn't have terraformed	I couldn't have been terraforming
you couldn't have been terraforming
he couldn't have been terraforming
we couldn't have been terraforming
you couldn't have been terraforming
they couldn't have been terraforming	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en 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? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I terraform?
couldn't you terraform?
couldn't he terraform?
couldn't we terraform?
couldn't you terraform?
couldn't they terraform? 	couldn't I be terraforming?
couldn't you be terraforming?
couldn't he be terraforming?
couldn't we be terraforming?
couldn't you be terraforming?
couldn't they be terraforming? 	couldn't I have terraformed?
couldn't you have terraformed?
couldn't he have terraformed?
couldn't we have terraformed?
couldn't you have terraformed?
couldn't they have terraformed? 	couldn't I have been terraforming?
couldn't you have been terraforming?
couldn't he have been terraforming?
couldn't we have been terraforming?
couldn't you have been terraforming?
couldn't they have been terraforming?