【正文】
個(gè)案調(diào)整 教師主導(dǎo)活動(dòng) 學(xué)生主體活動(dòng) Step1 Presentation asks :Who do operations on the plane ? Write down : ORBIS doctors do operations. them to change it into passive voice . Operations are done by ORBIS doctors . them to discuss them and explain: We can also introduce who or what performs an action in the passive voice using by .We put by and the performer after the verb . more examples . (1)Activities for the Computer Club are anized by Mr Lin (2)The little girl was saved by a policeman . (3)These photos were taken by Nancy . Step2 Practice 1. Ask them to plete the