English verb conjugation
COULD SURNAME

Regular verb: surname - surnamed - surnamed

Affirmation

Simple form	V-ing form
I could surname you could surname he could surname we could surname you could surname they could surname	I could be surnaming you could be surnaming he could be surnaming we could be surnaming you could be surnaming they could be surnaming
Perfect	V-ing perfect
I could have surnamed you could have surnamed he could have surnamed we could have surnamed you could have surnamed they could have surnamed	I could have been surnaming you could have been surnaming he could have been surnaming we could have been surnaming you could have been surnaming they could have been surnaming

Negation

Simple form	V-ing form
I couldn't surname you couldn't surname he couldn't surname we couldn't surname you couldn't surname they couldn't surname	I couldn't be surnaming you couldn't be surnaming he couldn't be surnaming we couldn't be surnaming you couldn't be surnaming they couldn't be surnaming
Perfect	V-ing perfect
I couldn't have surnamed you couldn't have surnamed he couldn't have surnamed we couldn't have surnamed you couldn't have surnamed they couldn't have surnamed	I couldn't have been surnaming you couldn't have been surnaming he couldn't have been surnaming we couldn't have been surnaming you couldn't have been surnaming they couldn't have been surnaming

Interrogative form

Simple form	V-ing form
could I surname? could you surname? could he surname? could we surname? could you surname? could they surname?	could I be surnaming? could you be surnaming? could he be surnaming? could we be surnaming? could you be surnaming? could they be surnaming?
Perfect	V-ing perfect
could I have surnamed? could you have surnamed? could he have surnamed? could we have surnamed? could you have surnamed? could they have surnamed?	could I have been surnaming? could you have been surnaming? could he have been surnaming? could we have been surnaming? could you have been surnaming? could they have been surnaming?

Interro-negative form

Simple form	V-ing form
couldn't I surname? couldn't you surname? couldn't he surname? couldn't we surname? couldn't you surname? couldn't they surname?	couldn't I be surnaming? couldn't you be surnaming? couldn't he be surnaming? couldn't we be surnaming? couldn't you be surnaming? couldn't they be surnaming?
Perfect	V-ing perfect
couldn't I have surnamed? couldn't you have surnamed? couldn't he have surnamed? couldn't we have surnamed? couldn't you have surnamed? couldn't they have surnamed?	couldn't I have been surnaming? couldn't you have been surnaming? couldn't he have been surnaming? couldn't we have been surnaming? couldn't you have been surnaming? couldn't they have been surnaming?