This document provides strategies and examples for the written expression questions on the TOEFL exam. It discusses how each question contains one underlined sentence with four underlined words or phrases, and test-takers must choose the one word or phrase that is incorrect. It then gives tips on looking at just the underlined text first before reading the full sentence if needed. The rest of the document focuses on specific grammar rules around subject-verb agreement, including after prepositional phrases, expressions of quantity, inverted verbs, and certain singular words. It provides examples of each with explanations.