Understanding Must and Must Not in English

This page provides a detailed explanation of how to use "must" and "must not" (mustn't) in English, with a focus on school-related examples and rules.

Definition: "Must" expresses obligation or necessity - things that one has to do, while "must not" (mustn't) expresses prohibition - things that are not allowed.

Example: "I must do my homework" demonstrates positive obligation, while "I must not sleep in class" shows prohibition.

Vocabulary:

• Must = avoir l'obligation de
• Must not/Mustn't = ne pas avoir le droit de
• Homework = devoir
• Corridors = couloirs

Highlight: The exercise section includes five practical examples of classroom rules where students need to determine whether "must" or "must not" should be used:

1. Behavior regarding chewing gum in class
2. Rules about running in corridors
3. Attitude towards teachers
4. Proper disposal of papers
5. Rules about writing on tables

Quote: "I must do my homework" - This key example demonstrates the basic structure for expressing obligation in English.