Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could rivet sth you could rivet sth she could rivet sth we could rivet sth you could rivet sth they could rivet sth
V-ing form
I could be rivet sthing you could be rivet sthing she could be rivet sthing we could be rivet sthing you could be rivet sthing they could be rivet sthing
Perfect
I could have rivet sthed you could have rivet sthed she could have rivet sthed we could have rivet sthed you could have rivet sthed they could have rivet sthed
V-ing perfect
I could have been rivet sthing you could have been rivet sthing she could have been rivet sthing we could have been rivet sthing you could have been rivet sthing they could have been rivet sthing
Negation
Simple form
I could not rivet sth you could not rivet sth she could not rivet sth we could not rivet sth you could not rivet sth they could not rivet sth
V-ing form
I could not be rivet sthing you could not be rivet sthing she could not be rivet sthing we could not be rivet sthing you could not be rivet sthing they could not be rivet sthing
Perfect
I could not have rivet sthed you could not have rivet sthed she could not have rivet sthed we could not have rivet sthed you could not have rivet sthed they could not have rivet sthed
V-ing perfect
I could not have been rivet sthing you could not have been rivet sthing she could not have been rivet sthing we could not have been rivet sthing you could not have been rivet sthing they could not have been rivet sthing
Interrogative form
Simple form
could I rivet sth? could you rivet sth? could she rivet sth? could we rivet sth? could you rivet sth? could they rivet sth?
V-ing form
could I be rivet sthing? could you be rivet sthing? could she be rivet sthing? could we be rivet sthing? could you be rivet sthing? could they be rivet sthing?
Perfect
could I have rivet sthed? could you have rivet sthed? could she have rivet sthed? could we have rivet sthed? could you have rivet sthed? could they have rivet sthed?
V-ing perfect
could I have been rivet sthing? could you have been rivet sthing? could she have been rivet sthing? could we have been rivet sthing? could you have been rivet sthing? could they have been rivet sthing?
Interro-negative form
Simple form
could I not rivet sth? could you not rivet sth? could she not rivet sth? could we not rivet sth? could you not rivet sth? could they not rivet sth?
V-ing form
could I not be rivet sthing? could you not be rivet sthing? could she not be rivet sthing? could we not be rivet sthing? could you not be rivet sthing? could they not be rivet sthing?
Perfect
could I not have rivet sthed? could you not have rivet sthed? could she not have rivet sthed? could we not have rivet sthed? could you not have rivet sthed? could they not have rivet sthed?
V-ing perfect
could I not have been rivet sthing? could you not have been rivet sthing? could she not have been rivet sthing? could we not have been rivet sthing? could you not have been rivet sthing? could they not have been rivet sthing?