BAOS. In dim sum culture, they provide sustenance for the diner. Similarly, in sentence making, they provide fuel for two sentences to be combined into one.
B stands for but. It refers to things that are different.
A refers to and, which is the opposite of but. It refers to things that are alike.
O means or. It gives us a choice to choose between two options.
S means so. It informs us of something that happened as a result.
