Tense about relative clause.关系从句的时态问题 I was doing some practice about relative clause, and there was sentence said: Pablo Picasso had a daughter, Paloma, whose fashion designs have become famous worldwide. Why not 'whose fashion designs had become famous worldwide'？ 主句时态是过去时，为什么从句时态还是have呢？不是应该往后推一个时态变成过去完成时吗？