This document is from an English grammar tutorial website. It discusses the usage of the phrases "like", "as if", and "as though" in multiple sentences. Some key points covered include: using "look" and "look like" to describe how someone appears; using verbs before these phrases; using the past tense after "as if" to emphasize something is different from reality; and providing examples of rewriting sentences using these phrases. The document aims to explain the grammar rules and usage of these comparative phrases.