定语从句省略疑问

This is a story about a boy making his dream come true through his own hard work.

This is a story about a boywhoismaking his dream come true through his own hard work.

不是做定语从句作主语从句不能省略关系代词吗？

This is a story about a boy making his dream come true through his own hard work.

【判断】这是一个结构和语义都正确的句子。
假如把making his dream come true through his own hard work 剖析为目前分词作定语，则是语义错误的句子。由于这个故事写得太早了，“正在达成梦想的一个孩子”，如此的故事在全世界、在全国，甚至你的学校和社区里面，简直太多了。无需去写。

只有把 a boy making his dream come true through his own hard work 剖析为“动名词复合结构”，语义才允许。由于动名词意味着已经达成了我们的梦想，才需要大写而特写。就是说，动名词没时间性，达成梦想可以早于这个故事。

This is a story about a boywhoismaking his dream come true through his own hard work.

【判断】这是一个结构正确、语义错误的句子。错误在于定语从句作定语，跟上面目前分词作定语的剖析，同出一辙！