The British pop/soul band, Simply Red covered this song in 1989 and it became their second best-known hit after reaching number 1 in U.S. The original track was recorded in 1972 by Kenny Gamble and Leon Huff.
Here the aim of listening to this song is to become aware of the first conditional, which is actually the title of the song. The song also has some very useful expressions related to a romantic relationship between a couple that are arguing. Although it is a very old song, I chose it because it is easy to understand, but as I always say to my students, be careful with some of the expressions that are grammatically incorrect, like double negatives, but are often used in colloquial speech.