当他仅有四岁的时候就开始写音乐了的翻译：When he was only four years old when he began writing music 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

When only four years old when he began to write music

When he was only four years old when he began writing music

When he only has four year-old time started to write music

There are only 4 years old when he began writing music for the time when the

When he was only four years old when he began writing music