could slink
Irregular verb: slink - slunk- slunk

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could slink
you could slink
he could slink
we could slink
you could slink
they could slink 	I could be slinking
you could be slinking
he could be slinking
we could be slinking
you could be slinking
they could be slinking	I could have slunk
you could have slunk
he could have slunk
we could have slunk
you could have slunk
they could have slunk	I could have been slinking
you could have been slinking
he could have been slinking
we could have been slinking
you could have been slinking
they could have been slinking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't slink
you couldn't slink
he couldn't slink
we couldn't slink
you couldn't slink
they couldn't slink 	I couldn't be slinking
you couldn't be slinking
he couldn't be slinking
we couldn't be slinking
you couldn't be slinking
they couldn't be slinking	I couldn't have slunk
you couldn't have slunk
he couldn't have slunk
we couldn't have slunk
you couldn't have slunk
they couldn't have slunk	I couldn't have been slinking
you couldn't have been slinking
he couldn't have been slinking
we couldn't have been slinking
you couldn't have been slinking
they couldn't have been slinking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I slink?
could you slink?
could he slink?
could we slink?
could you slink?
could they slink? 	could I be slinking?
could you be slinking?
could he be slinking?
could we be slinking?
could you be slinking?
could they be slinking? 	could I have slunk?
could you have slunk?
could he have slunk?
could we have slunk?
could you have slunk?
could they have slunk? 	could I have been slinking?
could you have been slinking?
could he have been slinking?
could we have been slinking?
could you have been slinking?
could they have been slinking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I slink?
couldn't you slink?
couldn't he slink?
couldn't we slink?
couldn't you slink?
couldn't they slink? 	couldn't I be slinking?
couldn't you be slinking?
couldn't he be slinking?
couldn't we be slinking?
couldn't you be slinking?
couldn't they be slinking? 	couldn't I have slunk?
couldn't you have slunk?
couldn't he have slunk?
couldn't we have slunk?
couldn't you have slunk?
couldn't they have slunk? 	couldn't I have been slinking?
couldn't you have been slinking?
couldn't he have been slinking?
couldn't we have been slinking?
couldn't you have been slinking?
couldn't they have been slinking?