问题描述：
He was waiting a chance to prove of himself but things go contrary to one's wishes,
[句子错误] 主谓不一致,建议将he后的谓语动词改为第三人称单数.
怎么修改啊
问题解答：
我来补答
原句：He was waiting a chance to prove of himself but things go contrary to one's wishes.
中文：他正在等待一个机会去证明他自己但那些东西却不符合他的愿望（事与愿违）.
其实只有两处错误.一个是时态不一致,一个是宾格不正确.
但时态可以有两种改法,一是改成过去式,另一个是改成现在时.
1、改成现在时的（也是你问题中建议的）：
He is waiting a chance to prove of himeself but things go contrary to his wishes.
2、改成过去式的：
He was waiting a chance to prove of hime self but things went contrary to his wishes.
为什么习惯性地改成现在时呢?因为通常非故事阅读类的题目中的句子都是单一的,不是过去的,所以通常改成现在时.
