This is the fourth teaching period of this unit. To test whether the students have grasped the important and difficult language points they learned in the last period, the teacher should first offer them some revision exercises.

This teaching period is a grammar lesson. The students are expected to make clear what a command is and what a request is, and how to turn their direct speech into indirect speech in this period.

In this lesson, we will first offer a supposed situation and make the students learn about the differences between demands and requests. The situation makes students know that in English, giving commands is less polite than making a request. Not everyone should give commands. People who often give commands are bosses, teachers and parents. If giving commands, we use such structures as “Do. . . ” and “Don’t. . . ”; if making a request, we can say “Please do. . . ”, “Will/Would you(please). . . ? ”, “Can/Could you(please). . . ? ”, etc.