此节课主要讲的是must 另一个用法 ,表示肯定推断。
A:Whose jacket are those?
B:They ‘re theirs,It must belong to them/Den wen and Mary.
A: Whose backpack is this?
B: It’s mine. \ It belongs to me .
A: Whose magazine is this?
B: It must be Deng Wen’s.
\ It must belong to Deng Wen.