Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could endure endure you could endure endure he could endure endure we could endure endure you could endure endure they could endure endure
V-ing form
I could be endure enduring you could be endure enduring he could be endure enduring we could be endure enduring you could be endure enduring they could be endure enduring
Perfect
I could have endure endured you could have endure endured he could have endure endured we could have endure endured you could have endure endured they could have endure endured
V-ing perfect
I could have been endure enduring you could have been endure enduring he could have been endure enduring we could have been endure enduring you could have been endure enduring they could have been endure enduring
Negation
Simple form
I could not endure endure you could not endure endure he could not endure endure we could not endure endure you could not endure endure they could not endure endure
V-ing form
I could not be endure enduring you could not be endure enduring he could not be endure enduring we could not be endure enduring you could not be endure enduring they could not be endure enduring
Perfect
I could not have endure endured you could not have endure endured he could not have endure endured we could not have endure endured you could not have endure endured they could not have endure endured
V-ing perfect
I could not have been endure enduring you could not have been endure enduring he could not have been endure enduring we could not have been endure enduring you could not have been endure enduring they could not have been endure enduring
Interrogative form
Simple form
could I endure endure? could you endure endure? could he endure endure? could we endure endure? could you endure endure? could they endure endure?
V-ing form
could I be endure enduring? could you be endure enduring? could he be endure enduring? could we be endure enduring? could you be endure enduring? could they be endure enduring?
Perfect
could I have endure endured? could you have endure endured? could he have endure endured? could we have endure endured? could you have endure endured? could they have endure endured?
V-ing perfect
could I have been endure enduring? could you have been endure enduring? could he have been endure enduring? could we have been endure enduring? could you have been endure enduring? could they have been endure enduring?
Interro-negative form
Simple form
could I not endure endure? could you not endure endure? could he not endure endure? could we not endure endure? could you not endure endure? could they not endure endure?
V-ing form
could I not be endure enduring? could you not be endure enduring? could he not be endure enduring? could we not be endure enduring? could you not be endure enduring? could they not be endure enduring?
Perfect
could I not have endure endured? could you not have endure endured? could he not have endure endured? could we not have endure endured? could you not have endure endured? could they not have endure endured?
V-ing perfect
could I not have been endure enduring? could you not have been endure enduring? could he not have been endure enduring? could we not have been endure enduring? could you not have been endure enduring? could they not have been endure enduring?