은 자기

…’s own; oneself

→ 은
phrase Uncommon #6,359
…’s own; oneself 은 marks the topic after a vowel-ending noun, and 자기 refers back to that topic. Together, 은 자기 is a grammatical sequence rather than a standalone expression.
KO: 톰은 자기 차 안에서 가끔 노래해.
EN: Tom sometimes sings in his own car.

톰은 자기 아들의 졸업식 내내 울었어.

Tom cried throughout his son's graduation ceremony.

톰은 자기 차 안에서 가끔 노래해.

Tom sometimes sings in his car.

톰은 자기 말 한테 물렸어.

Tom was bitten by his own horse.

톰은 자기 차에서 자고 있었어.

Tom was sleeping in his car.

톰은 자기 부모님 이랑 프랑스어로 말해.

Tom speaks French with his parents.

톰은 자기 침대에 누워 있어.

Tom is lying in his bed.

톰은 자기 신발을 못 찾았다.

Tom couldn't find his shoes.

톰은 자기 컴퓨터를 껐어.

Tom turned off his computer.