He didn't send the letter. This is the way it is formed in the dialects of Connacht and Ulster. Unlike the past tense, the future tense of a verb is determined by which conjugation it belongs to. He won't buy the book. To begin with, here are a few Irish proverbs.
Unfamiliar vocabulary is at the right.
There are ten completely irregular verbs in Irish. We'll be learning one or two irregular verbs at a time in the upcoming lessons. At this point we have just enough grammar to start regular readings in each lesson. In the next lesson we'll look at a 19th-century love song from Connacht.