约2300字。
　　《Protecting ourselves》教案
　　●Task Writing an article with advice and warnings
　　General Introduction:
　　In this section, you will have opportunities to practice your listening, speaking, reading and writing skills. The task section is divided into three steps and each step is preceded with a silding activity. Through the three steps, you will learn how to identify degrees of obligation and categorize notes about warnings, how to ask for and offer alternatives and how to write warnings. After the learning, you are expected to write for the school news letter an article containing advice and warnings on the dangers of taking medicine unnecessarily.
　　Silding 1: identifying degrees of obligation
　　In this part, we will learn how to identify the degree of obligation when listening to advice. You should judge whether the advice is a suggestion or a necessity through the modal form or phrase used in the sentence. Look at the following sentence patterns:
　　You do not have to…
　　You ought (not) to…
　　You should (not)…
　　You had better/ had better not…
　　You have to…
　　You must/ must not…
　　Do you know which pattern expresses the strongest obligation, which expresses less strong obligation and which expresses the least strong obligation?
　　Let’s go on to look at some sentences and decide which are suggestions and which are necessities.
　　1. You don’t have to go school tomorrow if you are feeling ill.
　　2. You ought to eat some fruit every day
　　3. You had better wap earlier tomorrow.
　　4. You must not forget to do your homework.
　　5. You should get enough rest every night.
　　6. You must not forget to do your homework.
　　7. You ought not to eat so much ice .
　　8. You should not play puter games all evening.
　　9. You have to take medicine if you want to get better.
　　10. We must finish our project today because it is due tomorrow.
　　(Encourage students to give their own opinions. Any reasonable answers are acceptable)
　　Step 1: Categorizing notes about warnings
　　In this part, you will listen to a lecture by Dr Grey and write down the modal forms the doctor uses, and then categorize the obligation levels of the doctor’s advice.
　　1. Read the guidelines and the sentences in Part A. (give them some necessa