Section B (3a)-Self Check,根据图片提示补全对话 1.A: ? B:Yes, she is.She is my little sister.(sister) 2.A:Is she your mother? B: .(aunt,Is she your sister,No, she isnt.Shes my aunt,3.A: ? B:Yes, he is.He is my father.(father) 4.A: ? B:Yes, he is.Hes my brother.(brother,Is he your father,Is he your brother,5.A:Are these your parents? B: . (grandparents,No, they arent.Theyre my grandparents,he pron. 他 剖析he是第三人称代词的主格形式, 在句中作主语。如: He is my English teacher. 他是我的英语老师。 his是形容词性物主代词, 意为 “他的”, 在句中作定语, 修饰后面的名词。如: Hi