Any stretch of speech in the language, no matter how long, can then be identified as a sequence of sentence domains (no matter how long or short, or of what formulaic type). It may be that regularities can be found in the consecution of sentences in a stretch of speech or in a conversation, showing that sentences of one type are usually followed by others of the same type, or otherwise. Such regularities may perhaps be shown for one style of speaking in the language, and not for another.
- Harris (1951), a pag.352