The document defines conjunctions as words that join sentences and clauses to show their relationship. It provides examples of coordinating and subordinating conjunctions in English and their Japanese translations. Conjunctions in Japanese are typically particles or postpositions that come at the end of dependent clauses. The document then provides tables listing common English conjunctions paired with their Japanese translations in kanji, katakana/hiragana, and romaji scripts. It also provides examples sentences in Japanese using these conjunctions.