swimming is really my bag.这句英文怎么翻译,为什么要用bag

This is my bag改为同句 This bag is My bag is heavier than your bag同义句转换 his bag is yellow.my bag is red.同义句改为 his bag is ___ ___mine That is my bag.(改为同义句) My bag is there.的同义句 My school bag is My bag is red Where is my bag this is my bag. My bag is red 用red 提问 My bag isn't the same as yours.【改为同义句】 My bag is ------ ---- 翻译:Maybe that bag under the tree is your?为什么要用THAT?请给我讲一下这句话