帮我把下面的句子改成单数或负数形式
问题描述：
帮我把下面的句子改成单数或负数形式
lt's a blue eraser.this is a dictionary.that's my family photo.this is a photo of my family.ls that a box?yes,it is he is a boy.she isn't a chiese girl.are those apples?they aren't english diciionaries.these are my watches they are good girls.好的50分
答
1.They are blue erasers.2.These are dictionaries.3.Those are my family photos.4.Those are photos of my family.5.Are those boxes?6.Yes,they are.They are boys.7.They aren't Chinese girls.8.Is that an ap...