Please come in and have a look at English grammar.
Literary works such as English poems or songs pay attention to rhythm in principle, that is, the last phonetic symbol of the last word rhymes. As for grammatical problems, they are basically complete or expressed in slang or consent. In fact, we usually learn complete English, and foreigners sometimes don't understand it. Most of the words they use are colloquial, beautiful and popular. Of course, I'm not talking about saliva songs, so it's very helpful to learn spoken English by listening to songs and reciting lyrics.