を務めた

served as

→ を
phrase Rare #20,123
served as Used after a role or position to say someone served in that capacity.
JA: 彼女はチームのリーダーを務めた。
EN: She served as the team leader.

その会合で私は通訳を務めた。

I served as an interpreter at the meeting.

彼女が案内役を務めた。

She served as the guide.

主将の入院中は私が代理を務めた。

I served as captain while the regular captain was hospitalized.

上司がいないときには、いつもトムが代わりを務めた。

Whenever the boss was away, Tom always filled in.

彼は議長を務めた。

He served as chairperson.

彼は市長を務めた。

He served as mayor.

学生たちは教授の調査の助手を務めた。

The students served as assistants in the professor’s research.

裁判の二日間、彼はデイヴィッドの護衛を務めた。

He served as David’s bodyguard during the two-day trial.

キャプテンの入院中は、私が代理を務めた。

I filled in for the captain while he was in the hospital.

オリビアがハムレットの役を務めた。

Olivia played the role of Hamlet.

彼は三年議長を務めた。

He served as chairman for three years.