could sling
Irregular verb: sling - slung- slung

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could sling
you could sling
he could sling
we could sling
you could sling
they could sling 	I could be slinging
you could be slinging
he could be slinging
we could be slinging
you could be slinging
they could be slinging	I could have slung
you could have slung
he could have slung
we could have slung
you could have slung
they could have slung	I could have been slinging
you could have been slinging
he could have been slinging
we could have been slinging
you could have been slinging
they could have been slinging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not sling
you could not sling
he could not sling
we could not sling
you could not sling
they could not sling 	I could not be slinging
you could not be slinging
he could not be slinging
we could not be slinging
you could not be slinging
they could not be slinging	I could not have slung
you could not have slung
he could not have slung
we could not have slung
you could not have slung
they could not have slung	I could not have been slinging
you could not have been slinging
he could not have been slinging
we could not have been slinging
you could not have been slinging
they could not have been slinging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I sling?
could you sling?
could he sling?
could we sling?
could you sling?
could they sling? 	could I be slinging?
could you be slinging?
could he be slinging?
could we be slinging?
could you be slinging?
could they be slinging? 	could I have slung?
could you have slung?
could he have slung?
could we have slung?
could you have slung?
could they have slung? 	could I have been slinging?
could you have been slinging?
could he have been slinging?
could we have been slinging?
could you have been slinging?
could they have been slinging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not sling?
could you not sling?
could he not sling?
could we not sling?
could you not sling?
could they not sling? 	could I not be slinging?
could you not be slinging?
could he not be slinging?
could we not be slinging?
could you not be slinging?
could they not be slinging? 	could I not have slung?
could you not have slung?
could he not have slung?
could we not have slung?
could you not have slung?
could they not have slung? 	could I not have been slinging?
could you not have been slinging?
could he not have been slinging?
could we not have been slinging?
could you not have been slinging?
could they not have been slinging?