be in是什么意思？put on 和wear还有 be in，有什么区别？用wear和be in造句，谢谢！

be in是穿着……，一般作后置定语，后接颜色或衣服种类
put on是穿上的动作
wear强调穿着的状态
be in:the girl in red is my classmate.
wear:my mother is wearing a green blouse today.

be in 和wear 差不多，穿着，表示状态
put on 穿上，表示动作
He is in a blue coat/wearing a blue coat.
He is putting on his blue coat.