could rivet
Regular verb: rivet - riveted- riveted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could rivet
you could rivet
she could rivet
we could rivet
you could rivet
they could rivet 	I could be riveting
you could be riveting
she could be riveting
we could be riveting
you could be riveting
they could be riveting	I could have riveted
you could have riveted
she could have riveted
we could have riveted
you could have riveted
they could have riveted	I could have been riveting
you could have been riveting
she could have been riveting
we could have been riveting
you could have been riveting
they could have been riveting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not rivet
you could not rivet
she could not rivet
we could not rivet
you could not rivet
they could not rivet 	I could not be riveting
you could not be riveting
she could not be riveting
we could not be riveting
you could not be riveting
they could not be riveting	I could not have riveted
you could not have riveted
she could not have riveted
we could not have riveted
you could not have riveted
they could not have riveted	I could not have been riveting
you could not have been riveting
she could not have been riveting
we could not have been riveting
you could not have been riveting
they could not have been riveting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I rivet?
could you rivet?
could she rivet?
could we rivet?
could you rivet?
could they rivet? 	could I be riveting?
could you be riveting?
could she be riveting?
could we be riveting?
could you be riveting?
could they be riveting? 	could I have riveted?
could you have riveted?
could she have riveted?
could we have riveted?
could you have riveted?
could they have riveted? 	could I have been riveting?
could you have been riveting?
could she have been riveting?
could we have been riveting?
could you have been riveting?
could they have been riveting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not rivet?
could you not rivet?
could she not rivet?
could we not rivet?
could you not rivet?
could they not rivet? 	could I not be riveting?
could you not be riveting?
could she not be riveting?
could we not be riveting?
could you not be riveting?
could they not be riveting? 	could I not have riveted?
could you not have riveted?
could she not have riveted?
could we not have riveted?
could you not have riveted?
could they not have riveted? 	could I not have been riveting?
could you not have been riveting?
could she not have been riveting?
could we not have been riveting?
could you not have been riveting?
could they not have been riveting?