This is my first bag中first前要加the吗

This is my first bag中first前要加the吗 this is my bag. This is My first This is my bag改为同句 This bag is This blue bag is ______ my mother. This is the my bag(改错） This is your family photo . M ( )is in my bag. this is my first time______（cook） This is my first visit ________ China. 如果按This is my bag.改写成This bag is mine.whose shirt is this?怎么改?请指教! This is my bag.（改为一般疑问句） this my not bag is 连词成句 Is this hers bag? this black bag is Is ths your bag?“怎么回答?可以用This is my bag吗?为什么?我主要是问可以用This is my bag吗？ Where is my bag My school bag is This is my own bag.=This is a __ __ __ __