unit4 Wheres my schoolbag? Section BWheres Sally?Shes in/on/under/behind/near the box. oninunderbehindnear记忆挑战Wheres Sally?Shes the box. 1 2 3 4 5Is the schoolbag on the sofa?Is the clock on the table?Yes, it is.No, it isnt.Are the books on the sofa?Are they in the bookcase?No, they arent.Yes, they are.Be + 主语 + 介词短语？询问某物或某人在某处吗？Be 动词的变化随主语的单复数而变化。当某人或某物是单数时， be 动词用is ；回答为Yes, it is. No, it isnt.当某人或某物是复数时， be 动词用are;回答为Yes, they are. No, they arent.Section Bradiotapetape player clockmodel plan
