could snap
Regular verb: snap - snapped- snapped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could snap
you could snap
he could snap
we could snap
you could snap
they could snap 	I could be snapping
you could be snapping
he could be snapping
we could be snapping
you could be snapping
they could be snapping	I could have snapped
you could have snapped
he could have snapped
we could have snapped
you could have snapped
they could have snapped	I could have been snapping
you could have been snapping
he could have been snapping
we could have been snapping
you could have been snapping
they could have been snapping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not snap
you could not snap
he could not snap
we could not snap
you could not snap
they could not snap 	I could not be snapping
you could not be snapping
he could not be snapping
we could not be snapping
you could not be snapping
they could not be snapping	I could not have snapped
you could not have snapped
he could not have snapped
we could not have snapped
you could not have snapped
they could not have snapped	I could not have been snapping
you could not have been snapping
he could not have been snapping
we could not have been snapping
you could not have been snapping
they could not have been snapping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I snap?
could you snap?
could he snap?
could we snap?
could you snap?
could they snap? 	could I be snapping?
could you be snapping?
could he be snapping?
could we be snapping?
could you be snapping?
could they be snapping? 	could I have snapped?
could you have snapped?
could he have snapped?
could we have snapped?
could you have snapped?
could they have snapped? 	could I have been snapping?
could you have been snapping?
could he have been snapping?
could we have been snapping?
could you have been snapping?
could they have been snapping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not snap?
could you not snap?
could he not snap?
could we not snap?
could you not snap?
could they not snap? 	could I not be snapping?
could you not be snapping?
could he not be snapping?
could we not be snapping?
could you not be snapping?
could they not be snapping? 	could I not have snapped?
could you not have snapped?
could he not have snapped?
could we not have snapped?
could you not have snapped?
could they not have snapped? 	could I not have been snapping?
could you not have been snapping?
could he not have been snapping?
could we not have been snapping?
could you not have been snapping?
could they not have been snapping?