The subject-aux inversion can also happen in a when using negation or to express surprise or shock about a situation or a fact. There are expressions when placed at the beginning of a sentence that require the subject-aux inversion (Brinton & Brinton 233). Expressions that begin with a negative like:
The passage talks about how sentences can change when we use words like "not" or show surprise. It mentions that certain expressions at the start of a sentence need a specific word order change. It mentions a source for more information, which makes it seem trustworthy. However, it stops suddenly when it's about to give examples, which could have helped to explain this subject better to readers who are learning about it.