She is wearing a red coat today中为什么用is wearing?

She is wearing a red coat today中为什么用is wearing? She is a_____ wearing a red coat. She is wearing a () coat today Ann is wearing a red coat today.(改为同一句) she __ __ a red coat she is wearing a red coat同义词转化成 she __ __ a red coat Mary is wearing a red dress today. The girl wearing a red coat is my sister为什么用ing形式呢 she is wearing a blue coat today.不变题意改写句子 she is ___ ___ tod the girl is my friend .she is wearing a red coat 合并为一句 the girl is my friend.she is wearing a red coat.合并为一句话 The girl is my sister.She is wearing a red coat.(合并为一句） the girl is my sister .she is wearing a red coat(合并为一句）