French exercise book for the fourth year of learning. In Sourire 4, special cases of negation, the use of tenses (imparfait, passé composé, futur, futur antérieur, plus-que-parfait), sequence of tenses, and conditional sentences are explained in detail. Additionally, possessive pronouns, demonstrative and relative pronouns are covered. This volume also provides insights into the passive voice, agreement of adjectives, comparison of adverbs, as well as indefinite articles and pronouns like tout, chacun, etc. The structure of the work is similar to the previous volumes, featuring clear rules and explanations at the beginning of each chapter, self-assessment exercises afterward, and an answer key at the end of the book. The solutions often refer back to the rules applied in the respective examples. Unknown words can be found in the glossary.