be sure
idiom
—used to tell someone not to forget to do something
Be sure to lock the door when you leave.
Examples of be sure in a Sentence
Recent Examples on the Web
To be sure, Americans like their hotel breakfast.
—
Kevin Williams, CNBC, 15 Feb. 2026
Its short pile height means it won’t get caught under doors, and a quick vacuuming can keep it clean (just be sure to use a brushless attachment for best results).
—Caley Sturgill, Southern Living, 15 Feb. 2026
Update your emergency kit and be sure to include enough food and water to last for 3 days for each person in your home.
—Southern California Weather Report, Daily News, 15 Feb. 2026
Just be sure to snag the styles that catch your eye ASAP—they’re bound to fly off the shelves as spring gets closer.
—Cheryl Wagemann, InStyle, 15 Feb. 2026
See All Example Sentences for be sure
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Kevin Williams, CNBC, 15 Feb. 2026
Its short pile height means it won’t get caught under doors, and a quick vacuuming can keep it clean (just be sure to use a brushless attachment for best results).
—Caley Sturgill, Southern Living, 15 Feb. 2026
Update your emergency kit and be sure to include enough food and water to last for 3 days for each person in your home.
—Southern California Weather Report, Daily News, 15 Feb. 2026
Just be sure to snag the styles that catch your eye ASAP—they’re bound to fly off the shelves as spring gets closer.
—Cheryl Wagemann, InStyle, 15 Feb. 2026
See All Example Sentences for be sure
Cite this Entry
“Be sure.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/be%20sure. Accessed 20 Feb. 2026.
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