had become 和 had became 的区别?还是没有had became,只有had become 和 be

只有 had become 这一说法,had became这一说法是错误的
因为过去完成时的形式是had+动词的过去分词
而become这个词是不规则动词,它的过去式是became,过去分词是become,所以只有had become 这种形式