How a Tiny Word (3 Letters) Became the Hardest Word in English?

In this video, it's explained how a tiny word, consisting of just three letters, can be one of the most difficult words to learn. This is because more than 242 languages lack this word in their grammar, meaning that speakers of those languages must develop a completely new habit and a new way of thinking when learning English. Download the PDFs. 1- Definite Article Usage Guide. pdfhttps://drive.google.com/file/d/16Yh9... 2-linguistic_reward_the_article_tables.pdf https://drive.google.com/file/d/1bSxt... 3-Linguistic_Rewards_Country_Names_The.pdf https://drive.google.com/file/d/1urX-... 4-Definite Article Usage Guide.png https://drive.google.com/file/d/15PeV...