Teacher 熊正玲Students Grade 8 class 3Material 英语（人教版）Time 45 minutes Teaching designcontentUnit 3 what were you doing when the UFO arrived?Teaching analysisStudents have learned present progressive tense. So I will lead students from present progressive tense into past progressive tense.Teaching goalsa) The Ss can hear, read, and use the main sentence patterns b) The Ss can understand the content of the lesson.c) The Ss can use the past pr
