English verb conjugation
COULD CONTUSE

Regular verb: contuse - contused - contused

Affirmation

Simple form	V-ing form
I could contuse you could contuse she could contuse we could contuse you could contuse they could contuse	I could be contusing you could be contusing she could be contusing we could be contusing you could be contusing they could be contusing
Perfect	V-ing perfect
I could have contused you could have contused she could have contused we could have contused you could have contused they could have contused	I could have been contusing you could have been contusing she could have been contusing we could have been contusing you could have been contusing they could have been contusing

Negation

Simple form	V-ing form
I couldn't contuse you couldn't contuse she couldn't contuse we couldn't contuse you couldn't contuse they couldn't contuse	I couldn't be contusing you couldn't be contusing she couldn't be contusing we couldn't be contusing you couldn't be contusing they couldn't be contusing
Perfect	V-ing perfect
I couldn't have contused you couldn't have contused she couldn't have contused we couldn't have contused you couldn't have contused they couldn't have contused	I couldn't have been contusing you couldn't have been contusing she couldn't have been contusing we couldn't have been contusing you couldn't have been contusing they couldn't have been contusing

Interrogative form

Simple form	V-ing form
could I contuse? could you contuse? could she contuse? could we contuse? could you contuse? could they contuse?	could I be contusing? could you be contusing? could she be contusing? could we be contusing? could you be contusing? could they be contusing?
Perfect	V-ing perfect
could I have contused? could you have contused? could she have contused? could we have contused? could you have contused? could they have contused?	could I have been contusing? could you have been contusing? could she have been contusing? could we have been contusing? could you have been contusing? could they have been contusing?

Interro-negative form

Simple form	V-ing form
couldn't I contuse? couldn't you contuse? couldn't she contuse? couldn't we contuse? couldn't you contuse? couldn't they contuse?	couldn't I be contusing? couldn't you be contusing? couldn't she be contusing? couldn't we be contusing? couldn't you be contusing? couldn't they be contusing?
Perfect	V-ing perfect
couldn't I have contused? couldn't you have contused? couldn't she have contused? couldn't we have contused? couldn't you have contused? couldn't they have contused?	couldn't I have been contusing? couldn't you have been contusing? couldn't she have been contusing? couldn't we have been contusing? couldn't you have been contusing? couldn't they have been contusing?