be sure to
成語所屬單字sure
be sure to — 慣用語
1. used to tell someone to not forget to do something, or to give a warning or inst
1.慣用語
釋義
務必；一定要
used to tell someone to not forget to do something, or to give a warning or instruction
例句
Be sure to lock the back door and check all the windows before you leave the house.
Be sure to drink plenty of water during the long hike in the hot weather.