English verb conjugation
COULD TERRACE

Regular verb: terrace - terraced - terraced

Affirmation

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