English verb conjugation
COULD COEXTEND

Regular verb: coextend - coextended - coextended

Affirmation

Simple form	V-ing form
I could coextend you could coextend he could coextend we could coextend you could coextend they could coextend	I could be coextending you could be coextending he 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 he 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 he 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 he 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 he 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 he 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 he 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 he coextend? could we coextend? could you coextend? could they coextend?	could I be coextending? could you be coextending? could he 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 he 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 he 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 he 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 he 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 he 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 he have been coextending? couldn't we have been coextending? couldn't you have been coextending? couldn't they have been coextending?