English verb conjugation
COULD BACKSTITCH

Regular verb: backstitch - backstitched - backstitched

Affirmation

Simple form	V-ing form
I could backstitch you could backstitch he could backstitch we could backstitch you could backstitch they could backstitch	I could be backstitching you could be backstitching he could be backstitching we could be backstitching you could be backstitching they could be backstitching
Perfect	V-ing perfect
I could have backstitched you could have backstitched he could have backstitched we could have backstitched you could have backstitched they could have backstitched	I could have been backstitching you could have been backstitching he could have been backstitching we could have been backstitching you could have been backstitching they could have been backstitching

Negation

Simple form	V-ing form
I couldn't backstitch you couldn't backstitch he couldn't backstitch we couldn't backstitch you couldn't backstitch they couldn't backstitch	I couldn't be backstitching you couldn't be backstitching he couldn't be backstitching we couldn't be backstitching you couldn't be backstitching they couldn't be backstitching
Perfect	V-ing perfect
I couldn't have backstitched you couldn't have backstitched he couldn't have backstitched we couldn't have backstitched you couldn't have backstitched they couldn't have backstitched	I couldn't have been backstitching you couldn't have been backstitching he couldn't have been backstitching we couldn't have been backstitching you couldn't have been backstitching they couldn't have been backstitching

Interrogative form

Simple form	V-ing form
could I backstitch? could you backstitch? could he backstitch? could we backstitch? could you backstitch? could they backstitch?	could I be backstitching? could you be backstitching? could he be backstitching? could we be backstitching? could you be backstitching? could they be backstitching?
Perfect	V-ing perfect
could I have backstitched? could you have backstitched? could he have backstitched? could we have backstitched? could you have backstitched? could they have backstitched?	could I have been backstitching? could you have been backstitching? could he have been backstitching? could we have been backstitching? could you have been backstitching? could they have been backstitching?

Interro-negative form

Simple form	V-ing form
couldn't I backstitch? couldn't you backstitch? couldn't he backstitch? couldn't we backstitch? couldn't you backstitch? couldn't they backstitch?	couldn't I be backstitching? couldn't you be backstitching? couldn't he be backstitching? couldn't we be backstitching? couldn't you be backstitching? couldn't they be backstitching?
Perfect	V-ing perfect
couldn't I have backstitched? couldn't you have backstitched? couldn't he have backstitched? couldn't we have backstitched? couldn't you have backstitched? couldn't they have backstitched?	couldn't I have been backstitching? couldn't you have been backstitching? couldn't he have been backstitching? couldn't we have been backstitching? couldn't you have been backstitching? couldn't they have been backstitching?