He said that he ____(ring) me up when he got there为什么是would ring?

He said that he ____(ring) me up when he got there为什么是would ring?
He said that he ____(ring) me up when he got there为什么是would ring?

He said that he ____(ring) me up when he got there为什么是would ring?
前面跟will的过去式,后面就要用动词的原形.
望采纳,谢谢O(∩_∩)O~