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What does “let sb know” mean?

Meaning, example sentence and a quick practice question.

B2

To tell someone some information

“Let me know if you're free on Friday.”

From the B2 lesson Making Plans (invitations and arranging).

Quick check

What does “let sb know” mean?

Teaching this phrase?“let sb know” is part of a ready-to-teach lesson, with a reading, three exercises, speaking tasks and an answer key, in Everyday English Chunks B2 Pack 2 (Plans, Problems and Feelings).
See the B2 lesson pack
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