when I was youngUsed to talk about something that happened during the speaker's childhood or youth. ฉัน means “I,” and ยังเด็ก literally means “still young.”
TH: ตอนฉันยังเด็ก ฉันชอบดูดาวตอนกลางคืน
EN: When I was young, I liked looking at the stars at night.