This document covers connectives that indicate cause and effect, contrast, and condition. It discusses zero, first, second, and third conditionals and their structures. Zero conditionals express general truths using if + present simple, present simple. First conditionals express possible future events using if + present simple, will + infinitive. Second conditionals express unlikely present or future events using if + past simple, would + infinitive. Third conditionals express imaginary past events using if + past perfect, would + have + past participle. The document concludes by congratulating someone on completing a grammar course that covered topics from basic to advanced English grammar.