英语必修2译林牛津版unit1
学案（第8-9课时） periods 8—9 grammar and usage aims: i. learn the basic forms of present perfect tense and present perfect continuous tense. ⅱ. learn to use them in different situations. iii. learn state verbs and action verbs in different situations. teaching procedures: i. basic forms present perfect tense : have / has done
