Modal verbs in Welsh grammar are words that express various modes or manners of action or being. They include “gallu” (can, to be able), “rhaid” (must, to have to), and “hoffi” (like, to like). Every verb is essential to forming various tenses, moods and voices. They allow students to better express themselves. They can express necessity, possibility, prediction, speculation, deduction and ability. When building sentences, keep in mind that verb conjugation in Welsh can be complex due to its different sentence structures and varieties of dialects.