1. Active: Mother made the pie yesterday. Passive: The pie was made by my mother yesterday. 2. Active: the teacher asks the questions. Passive: The questions are asked by the teacher. 3. Active: The students answer the questions. Passive: The questions are answered by students.
1how long have you had this phone? I have had it since last weekend. 2how long has she worked in this school? she has worked in this school for twelve years. 3how long have you been at school? we have been at school since half past eight. 4how long has your sister known her boyfriend? she has known him for a year. 5how long have your parents lived here? they have lived here since 1990.