Unit 2Mr Li was a teacher.Teaching periods1Teaching aims1.Words and phrases: studied ,hard 2. Sentences: Mr Li was a teacher. He taught Chinese. Chen Hai is an English teacher. Hes teaching Mr Li.3. Grammar: Talk about the past and the present.Teaching importancesThe difference between the past tense and the present tenseTeaching difficultiesTalk about the past and the present.Teaching aidsTape-recorder, word cards, picturesPre-set demandsThe students