English verb conjugation
COULD SERGE

Regular verb: serge - serged - serged

Affirmation

Simple form	V-ing form
I could serge you could serge she could serge we could serge you could serge they could serge	I could be serging you could be serging she could be serging we could be serging you could be serging they could be serging
Perfect	V-ing perfect
I could have serged you could have serged she could have serged we could have serged you could have serged they could have serged	I could have been serging you could have been serging she could have been serging we could have been serging you could have been serging they could have been serging

Negation

Simple form	V-ing form
I couldn't serge you couldn't serge she couldn't serge we couldn't serge you couldn't serge they couldn't serge	I couldn't be serging you couldn't be serging she couldn't be serging we couldn't be serging you couldn't be serging they couldn't be serging
Perfect	V-ing perfect
I couldn't have serged you couldn't have serged she couldn't have serged we couldn't have serged you couldn't have serged they couldn't have serged	I couldn't have been serging you couldn't have been serging she couldn't have been serging we couldn't have been serging you couldn't have been serging they couldn't have been serging

Interrogative form

Simple form	V-ing form
could I serge? could you serge? could she serge? could we serge? could you serge? could they serge?	could I be serging? could you be serging? could she be serging? could we be serging? could you be serging? could they be serging?
Perfect	V-ing perfect
could I have serged? could you have serged? could she have serged? could we have serged? could you have serged? could they have serged?	could I have been serging? could you have been serging? could she have been serging? could we have been serging? could you have been serging? could they have been serging?

Interro-negative form

Simple form	V-ing form
couldn't I serge? couldn't you serge? couldn't she serge? couldn't we serge? couldn't you serge? couldn't they serge?	couldn't I be serging? couldn't you be serging? couldn't she be serging? couldn't we be serging? couldn't you be serging? couldn't they be serging?
Perfect	V-ing perfect
couldn't I have serged? couldn't you have serged? couldn't she have serged? couldn't we have serged? couldn't you have serged? couldn't they have serged?	couldn't I have been serging? couldn't you have been serging? couldn't she have been serging? couldn't we have been serging? couldn't you have been serging? couldn't they have been serging?