English verb conjugation
COULD DETERGE

Regular verb: deterge - deterged - deterged

Affirmation

Simple form	V-ing form
I could deterge you could deterge she could deterge we could deterge you could deterge they could deterge	I could be deterging you could be deterging she could be deterging we could be deterging you could be deterging they could be deterging
Perfect	V-ing perfect
I could have deterged you could have deterged she could have deterged we could have deterged you could have deterged they could have deterged	I could have been deterging you could have been deterging she could have been deterging we could have been deterging you could have been deterging they could have been deterging

Negation

Simple form	V-ing form
I couldn't deterge you couldn't deterge she couldn't deterge we couldn't deterge you couldn't deterge they couldn't deterge	I couldn't be deterging you couldn't be deterging she couldn't be deterging we couldn't be deterging you couldn't be deterging they couldn't be deterging
Perfect	V-ing perfect
I couldn't have deterged you couldn't have deterged she couldn't have deterged we couldn't have deterged you couldn't have deterged they couldn't have deterged	I couldn't have been deterging you couldn't have been deterging she couldn't have been deterging we couldn't have been deterging you couldn't have been deterging they couldn't have been deterging

Interrogative form

Simple form	V-ing form
could I deterge? could you deterge? could she deterge? could we deterge? could you deterge? could they deterge?	could I be deterging? could you be deterging? could she be deterging? could we be deterging? could you be deterging? could they be deterging?
Perfect	V-ing perfect
could I have deterged? could you have deterged? could she have deterged? could we have deterged? could you have deterged? could they have deterged?	could I have been deterging? could you have been deterging? could she have been deterging? could we have been deterging? could you have been deterging? could they have been deterging?

Interro-negative form

Simple form	V-ing form
couldn't I deterge? couldn't you deterge? couldn't she deterge? couldn't we deterge? couldn't you deterge? couldn't they deterge?	couldn't I be deterging? couldn't you be deterging? couldn't she be deterging? couldn't we be deterging? couldn't you be deterging? couldn't they be deterging?
Perfect	V-ing perfect
couldn't I have deterged? couldn't you have deterged? couldn't she have deterged? couldn't we have deterged? couldn't you have deterged? couldn't they have deterged?	couldn't I have been deterging? couldn't you have been deterging? couldn't she have been deterging? couldn't we have been deterging? couldn't you have been deterging? couldn't they have been deterging?