Is "'ready" an abbreviation for "already"? Isn't it too confusing with the word "ready"?
Native speaker’s answer
Rebecca
"Ready" is not an abbreviation for "already", and if you were to use it that way in conversation people would be very confused and misunderstand you. Here "ready" is only being used as an abbreviation for "already" because it fits the beat and timing of the song. Grammatically speaking it is incorrect, but as it is a song some rules of grammar are commonly ignored.