语法没有错误.
完整的句子,比如说,应该是：
What makes her beautiful is THAT she has a kind heart.
=== That she is kind-hearted makes her beautiful.
what == something that你好。语法没有错误。完整的句子，比如说，应该是：What makes her beautiful is THAT she has a kind heart. === That she is kind-hearted makes her beautiful.what == something thatthat一定要加吗？是的。作为主语从句的连接词，that不能省略，否则没有的话，句子就乱了。多谢welcome indeed