could scroll
Regular verb: scroll - scrolled- scrolled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could scroll
you could scroll
she could scroll
we could scroll
you could scroll
they could scroll 	I could be scrolling
you could be scrolling
she could be scrolling
we could be scrolling
you could be scrolling
they could be scrolling	I could have scrolled
you could have scrolled
she could have scrolled
we could have scrolled
you could have scrolled
they could have scrolled	I could have been scrolling
you could have been scrolling
she could have been scrolling
we could have been scrolling
you could have been scrolling
they could have been scrolling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't scroll
you couldn't scroll
she couldn't scroll
we couldn't scroll
you couldn't scroll
they couldn't scroll 	I couldn't be scrolling
you couldn't be scrolling
she couldn't be scrolling
we couldn't be scrolling
you couldn't be scrolling
they couldn't be scrolling	I couldn't have scrolled
you couldn't have scrolled
she couldn't have scrolled
we couldn't have scrolled
you couldn't have scrolled
they couldn't have scrolled	I couldn't have been scrolling
you couldn't have been scrolling
she couldn't have been scrolling
we couldn't have been scrolling
you couldn't have been scrolling
they couldn't have been scrolling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I scroll?
could you scroll?
could she scroll?
could we scroll?
could you scroll?
could they scroll? 	could I be scrolling?
could you be scrolling?
could she be scrolling?
could we be scrolling?
could you be scrolling?
could they be scrolling? 	could I have scrolled?
could you have scrolled?
could she have scrolled?
could we have scrolled?
could you have scrolled?
could they have scrolled? 	could I have been scrolling?
could you have been scrolling?
could she have been scrolling?
could we have been scrolling?
could you have been scrolling?
could they have been scrolling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I scroll?
couldn't you scroll?
couldn't she scroll?
couldn't we scroll?
couldn't you scroll?
couldn't they scroll? 	couldn't I be scrolling?
couldn't you be scrolling?
couldn't she be scrolling?
couldn't we be scrolling?
couldn't you be scrolling?
couldn't they be scrolling? 	couldn't I have scrolled?
couldn't you have scrolled?
couldn't she have scrolled?
couldn't we have scrolled?
couldn't you have scrolled?
couldn't they have scrolled? 	couldn't I have been scrolling?
couldn't you have been scrolling?
couldn't she have been scrolling?
couldn't we have been scrolling?
couldn't you have been scrolling?
couldn't they have been scrolling?