Final answer:
Phrases are groups of words in a sentence that act as a unit but do not contain a subject and a verb. They provide details and context within sentences, such as 'lasting until dark,' which relates to time, and 'her teacher from last year,' which specifies a relationship.
Step-by-step explanation:
Finding the phrases 'unless it dies,' 'pretty sure,' 'lasting until dark,' and 'her teacher from last year' involves identifying the groups of words that form a unit within a sentence but do not contain a subject and a verb. Phrases add detail to sentences and can be found across various contexts and examples provided. For instance, 'lasting until dark' speaks about a time duration, similar to how the setting sun 'hung there in the glittering sky,' described in the text. 'Her teacher from last year' relates to an individual from the past, akin to the relationship mentioned with 'my teacher' in the provided passage.