This document introduces and provides examples of using the time conjunctions "when", "after", and "before" in spoken and written English. It explains that these conjunctions are used to describe the chronological order of events. Some key points: - "When" refers to events happening simultaneously or immediately after another. - "Before" connects one event that occurs prior to another. - "After" joins clauses where a period of time has passed or an event has ended before another begins. - Examples are given like "Before sleeping, it is better to relax" and "When drinking water, don't gulp it down." - Rules are provided for using subordinate clauses with these conjunctions