1) Something you say to refuse someone's invitation to perform a certain activity.
2) Something you say to ask someone to stop or calm down.
3) "Let's not" can be followed by "with" + (nominalconstruction)
Example: 1)
Daniel: Hey let's go for a run.
Joe: let's not
A famous phrase used by The Beatles, also a REALLY good album (if you like The Beatles, if you do you already have it).
Example: When I find myself in times of trouble, Mother Mary comes to me, Speaking words of wisdom, let it be. And in my hour of darkness, She is standing right in front of me, Speaking words of wisdom, let it be. Let it be, let it be, Let it be, let it be, Whisper words of wisdom, let it be.
A famous song written by Paul McCartney and preformed by The Beatles. It was released on the album "Let it Be" and became one of the last singles by the Beatles to reach #1 on the US charts.