could slip-stitch
Regular verb: slip-stitch - slip-stitched- slip-stitched

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not slip-stitch
you could not slip-stitch
he could not slip-stitch
we could not slip-stitch
you could not slip-stitch
they could not slip-stitch 	I could not be slip-stitching
you could not be slip-stitching
he could not be slip-stitching
we could not be slip-stitching
you could not be slip-stitching
they could not be slip-stitching	I could not have slip-stitched
you could not have slip-stitched
he could not have slip-stitched
we could not have slip-stitched
you could not have slip-stitched
they could not have slip-stitched	I could not have been slip-stitching
you could not have been slip-stitching
he could not have been slip-stitching
we could not have been slip-stitching
you could not have been slip-stitching
they could not have been slip-stitching	

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

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not slip-stitch?
could you not slip-stitch?
could he not slip-stitch?
could we not slip-stitch?
could you not slip-stitch?
could they not slip-stitch? 	could I not be slip-stitching?
could you not be slip-stitching?
could he not be slip-stitching?
could we not be slip-stitching?
could you not be slip-stitching?
could they not be slip-stitching? 	could I not have slip-stitched?
could you not have slip-stitched?
could he not have slip-stitched?
could we not have slip-stitched?
could you not have slip-stitched?
could they not have slip-stitched? 	could I not have been slip-stitching?
could you not have been slip-stitching?
could he not have been slip-stitching?
could we not have been slip-stitching?
could you not have been slip-stitching?
could they not have been slip-stitching?