English verb conjugation
COULD MACHINE-STITCH

Regular verb: machine-stitch - machine-stitched - machine-stitched

Affirmation

Simple form	V-ing form
I could machine-stitch you could machine-stitch he could machine-stitch we could machine-stitch you could machine-stitch they could machine-stitch	I could be machine-stitching you could be machine-stitching he could be machine-stitching we could be machine-stitching you could be machine-stitching they could be machine-stitching
Perfect	V-ing perfect
I could have machine-stitched you could have machine-stitched he could have machine-stitched we could have machine-stitched you could have machine-stitched they could have machine-stitched	I could have been machine-stitching you could have been machine-stitching he could have been machine-stitching we could have been machine-stitching you could have been machine-stitching they could have been machine-stitching

Negation

Simple form	V-ing form
I couldn't machine-stitch you couldn't machine-stitch he couldn't machine-stitch we couldn't machine-stitch you couldn't machine-stitch they couldn't machine-stitch	I couldn't be machine-stitching you couldn't be machine-stitching he couldn't be machine-stitching we couldn't be machine-stitching you couldn't be machine-stitching they couldn't be machine-stitching
Perfect	V-ing perfect
I couldn't have machine-stitched you couldn't have machine-stitched he couldn't have machine-stitched we couldn't have machine-stitched you couldn't have machine-stitched they couldn't have machine-stitched	I couldn't have been machine-stitching you couldn't have been machine-stitching he couldn't have been machine-stitching we couldn't have been machine-stitching you couldn't have been machine-stitching they couldn't have been machine-stitching

Interrogative form

Simple form	V-ing form
could I machine-stitch? could you machine-stitch? could he machine-stitch? could we machine-stitch? could you machine-stitch? could they machine-stitch?	could I be machine-stitching? could you be machine-stitching? could he be machine-stitching? could we be machine-stitching? could you be machine-stitching? could they be machine-stitching?
Perfect	V-ing perfect
could I have machine-stitched? could you have machine-stitched? could he have machine-stitched? could we have machine-stitched? could you have machine-stitched? could they have machine-stitched?	could I have been machine-stitching? could you have been machine-stitching? could he have been machine-stitching? could we have been machine-stitching? could you have been machine-stitching? could they have been machine-stitching?

Interro-negative form

Simple form	V-ing form
couldn't I machine-stitch? couldn't you machine-stitch? couldn't he machine-stitch? couldn't we machine-stitch? couldn't you machine-stitch? couldn't they machine-stitch?	couldn't I be machine-stitching? couldn't you be machine-stitching? couldn't he be machine-stitching? couldn't we be machine-stitching? couldn't you be machine-stitching? couldn't they be machine-stitching?
Perfect	V-ing perfect
couldn't I have machine-stitched? couldn't you have machine-stitched? couldn't he have machine-stitched? couldn't we have machine-stitched? couldn't you have machine-stitched? couldn't they have machine-stitched?	couldn't I have been machine-stitching? couldn't you have been machine-stitching? couldn't he have been machine-stitching? couldn't we have been machine-stitching? couldn't you have been machine-stitching? couldn't they have been machine-stitching?