English verb conjugation
COULD RIVET STH

Regular verb: rivet sth - rivet sthed - rivet sthed

Warning, this verb may not exist. Conjugation is given as example.

Affirmation

Simple form	V-ing form
I could rivet sth you could rivet sth he could rivet sth we could rivet sth you could rivet sth they could rivet sth	I could be rivet sthing you could be rivet sthing he could be rivet sthing we could be rivet sthing you could be rivet sthing they could be rivet sthing
Perfect	V-ing perfect
I could have rivet sthed you could have rivet sthed he could have rivet sthed we could have rivet sthed you could have rivet sthed they could have rivet sthed	I could have been rivet sthing you could have been rivet sthing he 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	V-ing form
I couldn't rivet sth you couldn't rivet sth he couldn't rivet sth we couldn't rivet sth you couldn't rivet sth they couldn't rivet sth	I couldn't be rivet sthing you couldn't be rivet sthing he couldn't be rivet sthing we couldn't be rivet sthing you couldn't be rivet sthing they couldn't be rivet sthing
Perfect	V-ing perfect
I couldn't have rivet sthed you couldn't have rivet sthed he couldn't have rivet sthed we couldn't have rivet sthed you couldn't have rivet sthed they couldn't have rivet sthed	I couldn't have been rivet sthing you couldn't have been rivet sthing he couldn't have been rivet sthing we couldn't have been rivet sthing you couldn't have been rivet sthing they couldn't have been rivet sthing

Interrogative form

Simple form	V-ing form
could I rivet sth? could you rivet sth? could he rivet sth? could we rivet sth? could you rivet sth? could they rivet sth?	could I be rivet sthing? could you be rivet sthing? could he be rivet sthing? could we be rivet sthing? could you be rivet sthing? could they be rivet sthing?
Perfect	V-ing perfect
could I have rivet sthed? could you have rivet sthed? could he have rivet sthed? could we have rivet sthed? could you have rivet sthed? could they have rivet sthed?	could I have been rivet sthing? could you have been rivet sthing? could he 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	V-ing form
couldn't I rivet sth? couldn't you rivet sth? couldn't he rivet sth? couldn't we rivet sth? couldn't you rivet sth? couldn't they rivet sth?	couldn't I be rivet sthing? couldn't you be rivet sthing? couldn't he be rivet sthing? couldn't we be rivet sthing? couldn't you be rivet sthing? couldn't they be rivet sthing?
Perfect	V-ing perfect
couldn't I have rivet sthed? couldn't you have rivet sthed? couldn't he have rivet sthed? couldn't we have rivet sthed? couldn't you have rivet sthed? couldn't they have rivet sthed?	couldn't I have been rivet sthing? couldn't you have been rivet sthing? couldn't he have been rivet sthing? couldn't we have been rivet sthing? couldn't you have been rivet sthing? couldn't they have been rivet sthing?