2016-2017学年 外研版 必修5 Module2 A job worth doing Grammar 课件 (1)
2016-2017学年 外研版 必修5 Module2 A job worth doing  Grammar 课件 (1)第4页

Which tense refers to actions in the past? Which tense refers to an action in progress when another thing happened? Which tense refers to something which happened before something else?

Key: a. past simple b. past continuous c. past perfect

Exercise 2 on page 14