1.学生自学生词，并记住单词拼写和拼读。
2.预习课本，找出重点短语和句式。
3.读、记后完成学案中自学导练作业。
Step 1情景导入
T:What can we see in public?
S1:We can see many signs.
T：What signs can we see in the hospitals？
S1:No smoking.S2:Keep quiet.
T:What about the parks?
S3:Don’t pick flowers.
S4：…T:What signs can we see in the museum?
S5:No photos.
S6:…
T：There are some other signs. We will learn in this period.
