This book focuses on the complex nature of the present perfect tense in English and aims to provide a fresh semantic interpretation. It delves into the challenges of differentiating it from the simple past tense and whether it should be classified as a "tense" or an "aspect". Ambiguity in present perfect constructions is explored, and existing theories based on "indefiniteness" or "current relevance" parameters are criticized for their inadequacy. The distinction between tense and aspect is also discussed, with various interpretations complicating its classification. Defining tense and aspect...