In what circumstances will the court allow appellant to amend or amend the causes of action?

In deciding whether the trial court abused its discretion in denying leave to amend these causes of action, it is appellant's duty to demonstrate how he could amend to assert a cause of action. (Blank v. Kirwan, supra, 39 Cal.3d at p. 318.) Appellant made no attempt before the trial court or this court to make such a showing. We conclude therefore that no amendment was possible and that the trial court correctly denied leave to amend.