The image is about English grammar, specifically the comparative form of adjectives. What are the rules for forming the comparative of short adjectives?

Comparative Form Rules for Short Adjectives

The image outlines several rules for forming the comparative degree of short adjectives in English:

• Rule 1: For most short (one-syllable) adjectives, add -er to the end. For example, young becomes younger.
• Rule 2: If a short adjective ends in -e, simply add -r. For example, safe becomes safer.
• Rule 3: If a short adjective ends in a short vowel followed by a consonant, double the consonant and add -er. For example, hot becomes hotter.
• Rule 4: For adjectives with two syllables that end in -y, change the -y to -i and add -er. (This rule is stated but no example is provided in the image.)

The image also provides a general example: 'comparative form + than'. For instance, 'Pete is older than Tom.'