Last Updated
：2025/11/23
keep an eye open
Sense（1）
Sense（2）
（ present singular third-person ）
（ participle present ）
（ participle past ）
（ past ）
Quizzes for review
(idiomatic) To remain vigilant for someone or something. / (idiomatic) To remain vigilant for a possibly dangerous situation.
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keep an eye open
Could you keep an eye open for any suspicious activity near the office while I'm on vacation?
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Could you keep an eye open for any suspicious activity near the office while I'm on vacation?
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