What Does "but first lock the door behind you" Mean?
Learn what "but first lock the door behind you" means, when people say it, and how to use it naturally in English.
But first, lock the door behind you.
This means the speaker is telling someone to secure the door after entering or leaving.
From I'M Obsessed With My Boss Part I, Episode 48
When do people say this?
Scene Context
Someone gives a safety-related instruction before the other person enters or continues moving.
Usage Scenario
Use this as a practical instruction in a home, office, or other private space. It can sound bossy if said without context or a polite tone.
Better ways to say it
Lock the door behind you.
Remember to lock the door.
Please lock the door behind you.
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