could terrace
Regular verb: terrace - terraced- terraced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could terrace
you could terrace
she could terrace
we could terrace
you could terrace
they could terrace 	I could be terracing
you could be terracing
she could be terracing
we could be terracing
you could be terracing
they could be terracing	I could have terraced
you could have terraced
she could have terraced
we could have terraced
you could have terraced
they could have terraced	I could have been terracing
you could have been terracing
she could have been terracing
we could have been terracing
you could have been terracing
they could have been terracing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't terrace
you couldn't terrace
she couldn't terrace
we couldn't terrace
you couldn't terrace
they couldn't terrace 	I couldn't be terracing
you couldn't be terracing
she couldn't be terracing
we couldn't be terracing
you couldn't be terracing
they couldn't be terracing	I couldn't have terraced
you couldn't have terraced
she couldn't have terraced
we couldn't have terraced
you couldn't have terraced
they couldn't have terraced	I couldn't have been terracing
you couldn't have been terracing
she couldn't have been terracing
we couldn't have been terracing
you couldn't have been terracing
they couldn't have been terracing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I terrace?
could you terrace?
could she terrace?
could we terrace?
could you terrace?
could they terrace? 	could I be terracing?
could you be terracing?
could she be terracing?
could we be terracing?
could you be terracing?
could they be terracing? 	could I have terraced?
could you have terraced?
could she have terraced?
could we have terraced?
could you have terraced?
could they have terraced? 	could I have been terracing?
could you have been terracing?
could she have been terracing?
could we have been terracing?
could you have been terracing?
could they have been terracing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I terrace?
couldn't you terrace?
couldn't she terrace?
couldn't we terrace?
couldn't you terrace?
couldn't they terrace? 	couldn't I be terracing?
couldn't you be terracing?
couldn't she be terracing?
couldn't we be terracing?
couldn't you be terracing?
couldn't they be terracing? 	couldn't I have terraced?
couldn't you have terraced?
couldn't she have terraced?
couldn't we have terraced?
couldn't you have terraced?
couldn't they have terraced? 	couldn't I have been terracing?
couldn't you have been terracing?
couldn't she have been terracing?
couldn't we have been terracing?
couldn't you have been terracing?
couldn't they have been terracing?