1 child ..... 2 man ..... 3 box ..... 4 leaf ..... 5 watch ..... 6 boy ..... 7 party .....

Множественное число:

1. child — children
2. man — men
3. box — boxes
4. leaf — leaves
5. watch — watches
6. boy — boys
7. party — parties

Ответ: children, men, boxes, leaves, watches, boys, parties.