找出不可数名词并在其后的横线上打勾,然后将可数名词单数变成负数形式或将复数形式变成单数.
1.money
2.American
3.bread
4.leaf
5.mouth
6.boy
7.photo
8.bus
9.watch
10.hat
11.families
12.sheep
13.knives
14.woman
15.news
16.baby
17.Chinese
18.homework
19.potato
20.children
21.toothbrush
22.box
23.party
24.sugar
25.nature
26.grass