could sclaff
Regular verb: sclaff - sclaffed- sclaffed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could sclaff
you could sclaff
she could sclaff
we could sclaff
you could sclaff
they could sclaff 	I could be sclaffing
you could be sclaffing
she could be sclaffing
we could be sclaffing
you could be sclaffing
they could be sclaffing	I could have sclaffed
you could have sclaffed
she could have sclaffed
we could have sclaffed
you could have sclaffed
they could have sclaffed	I could have been sclaffing
you could have been sclaffing
she could have been sclaffing
we could have been sclaffing
you could have been sclaffing
they could have been sclaffing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not sclaff
you could not sclaff
she could not sclaff
we could not sclaff
you could not sclaff
they could not sclaff 	I could not be sclaffing
you could not be sclaffing
she could not be sclaffing
we could not be sclaffing
you could not be sclaffing
they could not be sclaffing	I could not have sclaffed
you could not have sclaffed
she could not have sclaffed
we could not have sclaffed
you could not have sclaffed
they could not have sclaffed	I could not have been sclaffing
you could not have been sclaffing
she could not have been sclaffing
we could not have been sclaffing
you could not have been sclaffing
they could not have been sclaffing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I sclaff?
could you sclaff?
could she sclaff?
could we sclaff?
could you sclaff?
could they sclaff? 	could I be sclaffing?
could you be sclaffing?
could she be sclaffing?
could we be sclaffing?
could you be sclaffing?
could they be sclaffing? 	could I have sclaffed?
could you have sclaffed?
could she have sclaffed?
could we have sclaffed?
could you have sclaffed?
could they have sclaffed? 	could I have been sclaffing?
could you have been sclaffing?
could she have been sclaffing?
could we have been sclaffing?
could you have been sclaffing?
could they have been sclaffing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not sclaff?
could you not sclaff?
could she not sclaff?
could we not sclaff?
could you not sclaff?
could they not sclaff? 	could I not be sclaffing?
could you not be sclaffing?
could she not be sclaffing?
could we not be sclaffing?
could you not be sclaffing?
could they not be sclaffing? 	could I not have sclaffed?
could you not have sclaffed?
could she not have sclaffed?
could we not have sclaffed?
could you not have sclaffed?
could they not have sclaffed? 	could I not have been sclaffing?
could you not have been sclaffing?
could she not have been sclaffing?
could we not have been sclaffing?
could you not have been sclaffing?
could they not have been sclaffing?