English verb conjugation
COULD SUBTEND

Regular verb: subtend - subtended - subtended

Affirmation

Simple form	V-ing form
I could subtend you could subtend he could subtend we could subtend you could subtend they could subtend	I could be subtending you could be subtending he could be subtending we could be subtending you could be subtending they could be subtending
Perfect	V-ing perfect
I could have subtended you could have subtended he could have subtended we could have subtended you could have subtended they could have subtended	I could have been subtending you could have been subtending he could have been subtending we could have been subtending you could have been subtending they could have been subtending

Negation

Simple form	V-ing form
I could not subtend you could not subtend he could not subtend we could not subtend you could not subtend they could not subtend	I could not be subtending you could not be subtending he could not be subtending we could not be subtending you could not be subtending they could not be subtending
Perfect	V-ing perfect
I could not have subtended you could not have subtended he could not have subtended we could not have subtended you could not have subtended they could not have subtended	I could not have been subtending you could not have been subtending he could not have been subtending we could not have been subtending you could not have been subtending they could not have been subtending

Interrogative form

Simple form	V-ing form
could I subtend? could you subtend? could he subtend? could we subtend? could you subtend? could they subtend?	could I be subtending? could you be subtending? could he be subtending? could we be subtending? could you be subtending? could they be subtending?
Perfect	V-ing perfect
could I have subtended? could you have subtended? could he have subtended? could we have subtended? could you have subtended? could they have subtended?	could I have been subtending? could you have been subtending? could he have been subtending? could we have been subtending? could you have been subtending? could they have been subtending?

Interro-negative form

Simple form	V-ing form
could I not subtend? could you not subtend? could he not subtend? could we not subtend? could you not subtend? could they not subtend?	could I not be subtending? could you not be subtending? could he not be subtending? could we not be subtending? could you not be subtending? could they not be subtending?
Perfect	V-ing perfect
could I not have subtended? could you not have subtended? could he not have subtended? could we not have subtended? could you not have subtended? could they not have subtended?	could I not have been subtending? could you not have been subtending? could he not have been subtending? could we not have been subtending? could you not have been subtending? could they not have been subtending?