could infix
Regular verb: infix - infixed- infixed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could infix
you could infix
she could infix
we could infix
you could infix
they could infix 	I could be infixing
you could be infixing
she could be infixing
we could be infixing
you could be infixing
they could be infixing	I could have infixed
you could have infixed
she could have infixed
we could have infixed
you could have infixed
they could have infixed	I could have been infixing
you could have been infixing
she could have been infixing
we could have been infixing
you could have been infixing
they could have been infixing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't infix
you couldn't infix
she couldn't infix
we couldn't infix
you couldn't infix
they couldn't infix 	I couldn't be infixing
you couldn't be infixing
she couldn't be infixing
we couldn't be infixing
you couldn't be infixing
they couldn't be infixing	I couldn't have infixed
you couldn't have infixed
she couldn't have infixed
we couldn't have infixed
you couldn't have infixed
they couldn't have infixed	I couldn't have been infixing
you couldn't have been infixing
she couldn't have been infixing
we couldn't have been infixing
you couldn't have been infixing
they couldn't have been infixing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I infix?
could you infix?
could she infix?
could we infix?
could you infix?
could they infix? 	could I be infixing?
could you be infixing?
could she be infixing?
could we be infixing?
could you be infixing?
could they be infixing? 	could I have infixed?
could you have infixed?
could she have infixed?
could we have infixed?
could you have infixed?
could they have infixed? 	could I have been infixing?
could you have been infixing?
could she have been infixing?
could we have been infixing?
could you have been infixing?
could they have been infixing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I infix?
couldn't you infix?
couldn't she infix?
couldn't we infix?
couldn't you infix?
couldn't they infix? 	couldn't I be infixing?
couldn't you be infixing?
couldn't she be infixing?
couldn't we be infixing?
couldn't you be infixing?
couldn't they be infixing? 	couldn't I have infixed?
couldn't you have infixed?
couldn't she have infixed?
couldn't we have infixed?
couldn't you have infixed?
couldn't they have infixed? 	couldn't I have been infixing?
couldn't you have been infixing?
couldn't she have been infixing?
couldn't we have been infixing?
couldn't you have been infixing?
couldn't they have been infixing?