Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could decorate decorate you could decorate decorate he could decorate decorate we could decorate decorate you could decorate decorate they could decorate decorate
V-ing form
I could be decorate decorating you could be decorate decorating he could be decorate decorating we could be decorate decorating you could be decorate decorating they could be decorate decorating
Perfect
I could have decorate decorated you could have decorate decorated he could have decorate decorated we could have decorate decorated you could have decorate decorated they could have decorate decorated
V-ing perfect
I could have been decorate decorating you could have been decorate decorating he could have been decorate decorating we could have been decorate decorating you could have been decorate decorating they could have been decorate decorating
Negation
Simple form
I could not decorate decorate you could not decorate decorate he could not decorate decorate we could not decorate decorate you could not decorate decorate they could not decorate decorate
V-ing form
I could not be decorate decorating you could not be decorate decorating he could not be decorate decorating we could not be decorate decorating you could not be decorate decorating they could not be decorate decorating
Perfect
I could not have decorate decorated you could not have decorate decorated he could not have decorate decorated we could not have decorate decorated you could not have decorate decorated they could not have decorate decorated
V-ing perfect
I could not have been decorate decorating you could not have been decorate decorating he could not have been decorate decorating we could not have been decorate decorating you could not have been decorate decorating they could not have been decorate decorating
Interrogative form
Simple form
could I decorate decorate? could you decorate decorate? could he decorate decorate? could we decorate decorate? could you decorate decorate? could they decorate decorate?
V-ing form
could I be decorate decorating? could you be decorate decorating? could he be decorate decorating? could we be decorate decorating? could you be decorate decorating? could they be decorate decorating?
Perfect
could I have decorate decorated? could you have decorate decorated? could he have decorate decorated? could we have decorate decorated? could you have decorate decorated? could they have decorate decorated?
V-ing perfect
could I have been decorate decorating? could you have been decorate decorating? could he have been decorate decorating? could we have been decorate decorating? could you have been decorate decorating? could they have been decorate decorating?
Interro-negative form
Simple form
could I not decorate decorate? could you not decorate decorate? could he not decorate decorate? could we not decorate decorate? could you not decorate decorate? could they not decorate decorate?
V-ing form
could I not be decorate decorating? could you not be decorate decorating? could he not be decorate decorating? could we not be decorate decorating? could you not be decorate decorating? could they not be decorate decorating?
Perfect
could I not have decorate decorated? could you not have decorate decorated? could he not have decorate decorated? could we not have decorate decorated? could you not have decorate decorated? could they not have decorate decorated?
V-ing perfect
could I not have been decorate decorating? could you not have been decorate decorating? could he not have been decorate decorating? could we not have been decorate decorating? could you not have been decorate decorating? could they not have been decorate decorating?