をはめた

put on

→ を
phrase Rare #36,752
put on The past tense of はめる, used for putting on or fitting items such as rings, gloves, glasses, or contact lenses. The item being put on comes before を.
JA: 出かける前に、指輪をはめた。
EN: I put on my ring before going out.

トムメアリー指に指輪をはめた

Tom put a ring on Mary's finger.

彼女はメガネをはずしてコンタクトをはめた

She took off her glasses and put in her contacts.

彼はメアリー指に指輪をはめた

He put a ring on Mary's finger.