could skirr
Regular verb: skirr - skirred- skirred

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could skirr
you could skirr
she could skirr
we could skirr
you could skirr
they could skirr 	I could be skirring
you could be skirring
she could be skirring
we could be skirring
you could be skirring
they could be skirring	I could have skirred
you could have skirred
she could have skirred
we could have skirred
you could have skirred
they could have skirred	I could have been skirring
you could have been skirring
she could have been skirring
we could have been skirring
you could have been skirring
they could have been skirring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not skirr
you could not skirr
she could not skirr
we could not skirr
you could not skirr
they could not skirr 	I could not be skirring
you could not be skirring
she could not be skirring
we could not be skirring
you could not be skirring
they could not be skirring	I could not have skirred
you could not have skirred
she could not have skirred
we could not have skirred
you could not have skirred
they could not have skirred	I could not have been skirring
you could not have been skirring
she could not have been skirring
we could not have been skirring
you could not have been skirring
they could not have been skirring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I skirr?
could you skirr?
could she skirr?
could we skirr?
could you skirr?
could they skirr? 	could I be skirring?
could you be skirring?
could she be skirring?
could we be skirring?
could you be skirring?
could they be skirring? 	could I have skirred?
could you have skirred?
could she have skirred?
could we have skirred?
could you have skirred?
could they have skirred? 	could I have been skirring?
could you have been skirring?
could she have been skirring?
could we have been skirring?
could you have been skirring?
could they have been skirring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not skirr?
could you not skirr?
could she not skirr?
could we not skirr?
could you not skirr?
could they not skirr? 	could I not be skirring?
could you not be skirring?
could she not be skirring?
could we not be skirring?
could you not be skirring?
could they not be skirring? 	could I not have skirred?
could you not have skirred?
could she not have skirred?
could we not have skirred?
could you not have skirred?
could they not have skirred? 	could I not have been skirring?
could you not have been skirring?
could she not have been skirring?
could we not have been skirring?
could you not have been skirring?
could they not have been skirring?