Singular and Plural worksheet for grammar practice.

To solve this worksheet, we need to change the word in parentheses into its plural form. This means changing "one thing" to "more than one thing."

Here is the step-by-step breakdown for each sentence:

1. child: The plural of *child* is irregular. It becomes children.
2. goose: The plural of *goose* is irregular. It becomes geese.
3. mouse: The plural of *mouse* is irregular. It becomes mice.
4. half: For words ending in *f*, we usually change the *f* to *v* and add *es*. It becomes halves.
5. tooth: The plural of *tooth* is irregular. It becomes teeth.
6. woman: The plural of *woman* is irregular. It becomes women.
7. knife: Change the *f* to *v* and add *es*. It becomes knives.
8. person: The plural of *person* is irregular. It becomes people.
9. loaf: Change the *f* to *v* and add *es*. It becomes loaves.
10. ox: The plural of *ox* is irregular. It becomes oxen.
11. wolf: Change the *f* to *v* and add *es*. It becomes wolves.
12. sheep: This word stays the same in singular and plural. It remains sheep.
13. potato: For words ending in *o*, we usually add *es*. It becomes potatoes.
14. butterfly: For words ending in a consonant + *y*, change the *y* to *i* and add *es*. It becomes butterflies.
15. calf: Change the *f* to *v* and add *es*. It becomes calves.
16. buffalo: Words ending in *o* often take *es*. It becomes buffaloes (or *buffalos*).
17. thief: Change the *f* to *v* and add *es*. It becomes thieves.
18. berry: Change the *y* to *i* and add *es*. It becomes berries.
19. fox: Add *es* because it ends in *x*. It becomes foxes.
20. elf: Change the *f* to *v* and add *es*. It becomes elves.

Final Answer:
1. children
2. geese
3. mice
4. halves
5. teeth
6. women
7. knives
8. people
9. loaves
10. oxen
11. wolves
12. sheep
13. potatoes
14. butterflies
15. calves
16. buffaloes
17. thieves
18. berries
19. foxes
20. elves