将以下单词从单数变为负数

问题描述:

将以下单词从单数变为负数
1.map____ 2.egg____ 3.box____ 4.phone___ 5.bus____ 6.pig_____
7.shop____ 8.bike____ 9.student____ 10.dog____ 11.watch____ 12.apple____

1.maps
2.eggs
3.boxes
4.phones
5.buses
6.pigs
7.shops
8.bikes
9.students
10.dogs
11.watches
12.apples