我写的英语作文里面的一段话,帮我改改语法错误
ChristopherReeve,an American actor best known for his portrayal of Superman,becameparalyzed after being thrown from a horse in 1995.However,he did not lose thehope and desired to live a better life and established the Christopher ReeveFoundation to help paralyzed people like him.It is optimistic attitudethat helped him continued his career,which made he stillhad a wonderful life