The article discusses how different types of focus structure in sentences are important for understanding language. It argues that syntax, intonation, and meaning all play a role in how focus is expressed. By incorporating focus structure into syntax, new insights are gained into tricky issues in language. For example, moving words to the front of a sentence is a fundamental part of grammar, not just a stylistic choice. Also, the idea of moving quantifiers around can be explained by focusing on sentence structure instead. This research is valuable for both formal and functional linguists interested in how language works.