実は間違ってた?know/know about/know ofの違いまとめ! https://yumemiru2-blog.com/%e5%ae%9f%e3%81%af%e9%96%93%e9%81%95%e3%81%a3%e3%81%a6%e3%81%9f%ef%bc%9fknow-know-about-know-of%e3%81%ae%e9%81%95%e3%81%84%e3%81%be%e3%81%a8%e3%82%81%ef%bc%81/