English verb conjugation
COULD INFIX

Regular verb: infix - infixed - infixed

Affirmation

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