English verb conjugation
COULD WHIPSTITCH

Regular verb: whipstitch - whipstitched - whipstitched

Affirmation

Simple form	V-ing form
I could whipstitch you could whipstitch he could whipstitch we could whipstitch you could whipstitch they could whipstitch	I could be whipstitching you could be whipstitching he could be whipstitching we could be whipstitching you could be whipstitching they could be whipstitching
Perfect	V-ing perfect
I could have whipstitched you could have whipstitched he could have whipstitched we could have whipstitched you could have whipstitched they could have whipstitched	I could have been whipstitching you could have been whipstitching he could have been whipstitching we could have been whipstitching you could have been whipstitching they could have been whipstitching

Negation

Simple form	V-ing form
I couldn't whipstitch you couldn't whipstitch he couldn't whipstitch we couldn't whipstitch you couldn't whipstitch they couldn't whipstitch	I couldn't be whipstitching you couldn't be whipstitching he couldn't be whipstitching we couldn't be whipstitching you couldn't be whipstitching they couldn't be whipstitching
Perfect	V-ing perfect
I couldn't have whipstitched you couldn't have whipstitched he couldn't have whipstitched we couldn't have whipstitched you couldn't have whipstitched they couldn't have whipstitched	I couldn't have been whipstitching you couldn't have been whipstitching he couldn't have been whipstitching we couldn't have been whipstitching you couldn't have been whipstitching they couldn't have been whipstitching

Interrogative form

Simple form	V-ing form
could I whipstitch? could you whipstitch? could he whipstitch? could we whipstitch? could you whipstitch? could they whipstitch?	could I be whipstitching? could you be whipstitching? could he be whipstitching? could we be whipstitching? could you be whipstitching? could they be whipstitching?
Perfect	V-ing perfect
could I have whipstitched? could you have whipstitched? could he have whipstitched? could we have whipstitched? could you have whipstitched? could they have whipstitched?	could I have been whipstitching? could you have been whipstitching? could he have been whipstitching? could we have been whipstitching? could you have been whipstitching? could they have been whipstitching?

Interro-negative form

Simple form	V-ing form
couldn't I whipstitch? couldn't you whipstitch? couldn't he whipstitch? couldn't we whipstitch? couldn't you whipstitch? couldn't they whipstitch?	couldn't I be whipstitching? couldn't you be whipstitching? couldn't he be whipstitching? couldn't we be whipstitching? couldn't you be whipstitching? couldn't they be whipstitching?
Perfect	V-ing perfect
couldn't I have whipstitched? couldn't you have whipstitched? couldn't he have whipstitched? couldn't we have whipstitched? couldn't you have whipstitched? couldn't they have whipstitched?	couldn't I have been whipstitching? couldn't you have been whipstitching? couldn't he have been whipstitching? couldn't we have been whipstitching? couldn't you have been whipstitching? couldn't they have been whipstitching?