英语必修2译林牛津版unit 1
教案06（grammar01） period six grammar and usage (1) ⅰ.teaching aims: 1.help ss learn how to form and use the present perfect tense 2.give a brief introduction to the present perfect tense and compare the difference between the simple past tense and the present perfect tense. ⅱ.teaching important points & difficult points:
