In Welsh grammar, there are three primary tenses: the past tense, the present tense, and the future tense. Each tense has its own specific conjugation patterns and usage rules.

The past tense is used to express actions or events that happened in the past. It is formed by adding different endings to the verb stem, depending on the subject pronoun. For example, the verb “to eat” in the past tense would be “bwytodd” for “he/she ate” and “bwytiodd” for “they ate”.

The present tense is used to describe actions or states that are happening in the present. It is formed by adding different endings to the verb stem, again depending on the subject pronoun. For example, the verb “to speak” in the present tense would be “siarad” for “he/she speaks” and “siaradau” for “they speak”.

The future tense is used to describe actions or events that will happen in the future. It is formed by adding the word “fydd” (will) before the verb stem. For example, the verb “to go” in the future tense would be “fydd yn mynd” for “he/she will go” and “fydd yn mynd” for “they will go”.

Overall, understanding the tenses in Welsh grammar is essential for effective communication and fluency in the language.