could coextend
Regular verb: coextend - coextended- coextended

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
I could not coextend
you could not coextend
she could not coextend
we could not coextend
you could not coextend
they could not coextend 	I could not be coextending
you could not be coextending
she could not be coextending
we could not be coextending
you could not be coextending
they could not be coextending	I could not have coextended
you could not have coextended
she could not have coextended
we could not have coextended
you could not have coextended
they could not have coextended	I could not have been coextending
you could not have been coextending
she could not have been coextending
we could not have been coextending
you could not have been coextending
they could not have been coextending	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
could I not coextend?
could you not coextend?
could she not coextend?
could we not coextend?
could you not coextend?
could they not coextend? 	could I not be coextending?
could you not be coextending?
could she not be coextending?
could we not be coextending?
could you not be coextending?
could they not be coextending? 	could I not have coextended?
could you not have coextended?
could she not have coextended?
could we not have coextended?
could you not have coextended?
could they not have coextended? 	could I not have been coextending?
could you not have been coextending?
could she not have been coextending?
could we not have been coextending?
could you not have been coextending?
could they not have been coextending?