"Know" is one of the most common verbs in English, and I know that you know what it means! But what you might not know is that we use this word in many idiomatic expressions, such as: for all I know know the drill not know what hit you you don't know the half of it You can learn these expressions with "know" in today's lesson! Lesson text: https://www.espressoenglish.net/10-more-english-expressions-with-the-word-know 300+ English Idioms Course: https://www.espressoenglish.net/english-idioms-course