“出庭”常见的英文表达是 appear in court 或 attend court，也可用 go to court（在特定语境下，表示去法庭参与诉讼相关活动，可含出庭之意） 。例如：
The defendant will appear in court next week.（被告下周将出庭。）
The lawyer advised his client to attend court on time.（律师建议他的当事人按时出庭。 ）
She had to go to court to testify.（她不得不出庭作证。 ）