The book in its little span of space, covers detail study of four pillars of the parts of speech, i.e., Adverbs, Prepositions, Conjunctions & Interjections. It includes the discussion of definition, classification, forms and formation of the above four. Besides, it provides space to discuss Degrees, Position of Adverbs in sentences; presents the role of Adverbial Function of Prepositions, role of Conjunctions to form sentences; and how different Interjections are formed and they express diverse emotions and feelings of a speaker.