30 Then Philip ran up to the chariot and heard the man reading Isaiah the prophet. “Do you understand what you are reading?” Philip asked.

Read Acts 8:30 Using Other Translations

And Philip ran thither to him, and heard him read the prophet Esaias, and said, Understandest thou what thou readest?
So Philip ran to him and heard him reading Isaiah the prophet and asked, "Do you understand what you are reading?"
Philip ran over and heard the man reading from the prophet Isaiah. Philip asked, “Do you understand what you are reading?”