This document outlines the subtopics covered in each unit of an English diploma program. Unit 1 focuses on topics related to the past tense like used to, expressions of quantity, and indirect questions. Unit 2 covers the future tense using will and be going to as well as modals, imperatives, and relative clauses. Time contrasts and conditional sentences are addressed in Unit 3. Unit 4 discusses participles, relative clauses, modals, conditional sentences, and reported speech.