เป็นการใช้ Past Perfrct Tesnse แสดงเหตุการณ์ที่เกิดขึ้นก่อน เนื่องจากเหตุการณ์ที่เกิดขึ้นหลังอยู่ในรูป Past Simple Tense ตามรูปแบบของ second action happened after the first action had been completed
As a Past event that occurred Tesnse Perfrct.Because of the events that occurred after the Simple Past Tense is a.According to the format ofsecond action happened after the first action had been completed
Using Past Perfrct Tesnse events that occurred prior to the incident after the Past Simple Tense in the form of a second action happened after the first action had been completed.