This document introduces three types of conditional sentences using examples. Type 1 uses the present tense in the if-clause and will+infinitive in the main clause. Type 2 uses the past tense in the if-clause and would+infinitive in the main clause. Type 3 uses the past perfect tense in the if-clause and would have+past participle in the main clause. It then provides exercises for the reader to practice identifying and using these conditional structures.