The document discusses different types of sentence inversions used to emphasize adverbial phrases. Type 1 inversions use an adverbial expression followed by an auxiliary verb and then the subject and main verb. Examples are given such as "Not only does he play football, but he also plays tennis." Type 2 inversions use an adverbial expression of place or movement followed by the main verb and then the subject. Examples given are "Outside the house was a sports car" and "There goes the bus." The document provides information on emphasizing adverbial phrases through different inversion structures in English sentences.