随堂演练及时体验 巩固提升 ⅰ.把下面的句子改成被动语态 1．the family are building a new house over there. _______________________________________________________ 答案 a new house is being built (by the family) over there. 2．the doctors are operating on his left leg. _______________________________________________________ 答案 his left leg is being operated on (by the doctors)． 3．we are sending helicopters to rescue them now.
