English verb conjugation
COULD COEXTEND

Regular verb: coextend - coextended - coextended

Affirmation

Simple form	V-ing form
I could coextend you could coextend she could coextend we could coextend you could coextend they could coextend	I could be coextending you could be coextending she could be coextending we could be coextending you could be coextending they could be coextending
Perfect	V-ing perfect
I could have coextended you could have coextended she could have coextended we could have coextended you could have coextended they could have coextended	I could have been coextending you could have been coextending she could have been coextending we could have been coextending you could have been coextending they could have been coextending

Negation

Simple form	V-ing form
I couldn't coextend you couldn't coextend she couldn't coextend we couldn't coextend you couldn't coextend they couldn't coextend	I couldn't be coextending you couldn't be coextending she couldn't be coextending we couldn't be coextending you couldn't be coextending they couldn't be coextending
Perfect	V-ing perfect
I couldn't have coextended you couldn't have coextended she couldn't have coextended we couldn't have coextended you couldn't have coextended they couldn't have coextended	I couldn't have been coextending you couldn't have been coextending she couldn't have been coextending we couldn't have been coextending you couldn't have been coextending they couldn't have been coextending

Interrogative form

Simple form	V-ing form
could I coextend? could you coextend? could she coextend? could we coextend? could you coextend? could they coextend?	could I be coextending? could you be coextending? could she be coextending? could we be coextending? could you be coextending? could they be coextending?
Perfect	V-ing perfect
could I have coextended? could you have coextended? could she have coextended? could we have coextended? could you have coextended? could they have coextended?	could I have been coextending? could you have been coextending? could she have been coextending? could we have been coextending? could you have been coextending? could they have been coextending?

Interro-negative form

Simple form	V-ing form
couldn't I coextend? couldn't you coextend? couldn't she coextend? couldn't we coextend? couldn't you coextend? couldn't they coextend?	couldn't I be coextending? couldn't you be coextending? couldn't she be coextending? couldn't we be coextending? couldn't you be coextending? couldn't they be coextending?
Perfect	V-ing perfect
couldn't I have coextended? couldn't you have coextended? couldn't she have coextended? couldn't we have coextended? couldn't you have coextended? couldn't they have coextended?	couldn't I have been coextending? couldn't you have been coextending? couldn't she have been coextending? couldn't we have been coextending? couldn't you have been coextending? couldn't they have been coextending?