could sluice
Regular verb: sluice - sluiced- sluiced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could sluice
you could sluice
she could sluice
we could sluice
you could sluice
they could sluice 	I could be sluicing
you could be sluicing
she could be sluicing
we could be sluicing
you could be sluicing
they could be sluicing	I could have sluiced
you could have sluiced
she could have sluiced
we could have sluiced
you could have sluiced
they could have sluiced	I could have been sluicing
you could have been sluicing
she could have been sluicing
we could have been sluicing
you could have been sluicing
they could have been sluicing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not sluice
you could not sluice
she could not sluice
we could not sluice
you could not sluice
they could not sluice 	I could not be sluicing
you could not be sluicing
she could not be sluicing
we could not be sluicing
you could not be sluicing
they could not be sluicing	I could not have sluiced
you could not have sluiced
she could not have sluiced
we could not have sluiced
you could not have sluiced
they could not have sluiced	I could not have been sluicing
you could not have been sluicing
she could not have been sluicing
we could not have been sluicing
you could not have been sluicing
they could not have been sluicing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I sluice?
could you sluice?
could she sluice?
could we sluice?
could you sluice?
could they sluice? 	could I be sluicing?
could you be sluicing?
could she be sluicing?
could we be sluicing?
could you be sluicing?
could they be sluicing? 	could I have sluiced?
could you have sluiced?
could she have sluiced?
could we have sluiced?
could you have sluiced?
could they have sluiced? 	could I have been sluicing?
could you have been sluicing?
could she have been sluicing?
could we have been sluicing?
could you have been sluicing?
could they have been sluicing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not sluice?
could you not sluice?
could she not sluice?
could we not sluice?
could you not sluice?
could they not sluice? 	could I not be sluicing?
could you not be sluicing?
could she not be sluicing?
could we not be sluicing?
could you not be sluicing?
could they not be sluicing? 	could I not have sluiced?
could you not have sluiced?
could she not have sluiced?
could we not have sluiced?
could you not have sluiced?
could they not have sluiced? 	could I not have been sluicing?
could you not have been sluicing?
could she not have been sluicing?
could we not have been sluicing?
could you not have been sluicing?
could they not have been sluicing?