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

They are blue erasers.These are dictionaries.Those are my family photos.Those are photos of my family.Are those boxes?Yes,they are. They are boys.They aren't Chinese girls.Is that an apple?It isn't an English dictionary.This is my watch.She is a good girl.

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...