could borrow
Regular verb: borrow - borrowed- borrowed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could borrow
you could borrow
she could borrow
we could borrow
you could borrow
they could borrow 	I could be borrowing
you could be borrowing
she could be borrowing
we could be borrowing
you could be borrowing
they could be borrowing	I could have borrowed
you could have borrowed
she could have borrowed
we could have borrowed
you could have borrowed
they could have borrowed	I could have been borrowing
you could have been borrowing
she could have been borrowing
we could have been borrowing
you could have been borrowing
they could have been borrowing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't borrow
you couldn't borrow
she couldn't borrow
we couldn't borrow
you couldn't borrow
they couldn't borrow 	I couldn't be borrowing
you couldn't be borrowing
she couldn't be borrowing
we couldn't be borrowing
you couldn't be borrowing
they couldn't be borrowing	I couldn't have borrowed
you couldn't have borrowed
she couldn't have borrowed
we couldn't have borrowed
you couldn't have borrowed
they couldn't have borrowed	I couldn't have been borrowing
you couldn't have been borrowing
she couldn't have been borrowing
we couldn't have been borrowing
you couldn't have been borrowing
they couldn't have been borrowing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I borrow?
could you borrow?
could she borrow?
could we borrow?
could you borrow?
could they borrow? 	could I be borrowing?
could you be borrowing?
could she be borrowing?
could we be borrowing?
could you be borrowing?
could they be borrowing? 	could I have borrowed?
could you have borrowed?
could she have borrowed?
could we have borrowed?
could you have borrowed?
could they have borrowed? 	could I have been borrowing?
could you have been borrowing?
could she have been borrowing?
could we have been borrowing?
could you have been borrowing?
could they have been borrowing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I borrow?
couldn't you borrow?
couldn't she borrow?
couldn't we borrow?
couldn't you borrow?
couldn't they borrow? 	couldn't I be borrowing?
couldn't you be borrowing?
couldn't she be borrowing?
couldn't we be borrowing?
couldn't you be borrowing?
couldn't they be borrowing? 	couldn't I have borrowed?
couldn't you have borrowed?
couldn't she have borrowed?
couldn't we have borrowed?
couldn't you have borrowed?
couldn't they have borrowed? 	couldn't I have been borrowing?
couldn't you have been borrowing?
couldn't she have been borrowing?
couldn't we have been borrowing?
couldn't you have been borrowing?
couldn't they have been borrowing?