There is no denying the fact that the knowledge of English language is becoming a necessity in today’s world of globalization. However, many people are unable to speak and write flawless English, in spite of their best efforts. This can invariably be attributed to their lack of knowledge of English grammar. The book, Most Common Errors in English, incorporates all the areas of grammar where there are possibilities of errors cropping up. Chapters on Tenses, Sequence of Tenses, Narration, Adverbs, Adjectives, Articles, Punctuation, Letter Writing, Idioms and Phrases, Prepositions, Agreement of the Verb with the Subject, Paronyms, Homonyms, Spellings, Question Tags and Short Answers, etc. have been included in the book so that the reader can familiarize himself with the rules of grammar besides knowing the flaws which might occur while writing or speaking English. At the end of each chapter, clues (answers) have been provided for each wrong sentence, thereby enabling the reader to identify the flaws in a particular sentence. We are confident that this book will help the readers to polish their English speaking and writing skills.