Singular and plural nouns worksheet for grammar practice.

The task is to convert each of the given singular nouns into their plural forms. Below is the solution with explanations for each conversion:

Singular to Plural Conversion Rules:

1. Most nouns: Add -s (e.g., "planet" → "planets").
2. Nouns ending in -s, -sh, -ch, -x, or -z: Add -es (e.g., "glass" → "glasses").
3. Nouns ending in -y: If the -y is preceded by a consonant, change -y to -ies (e.g., "staple" → "staples").
4. Irregular nouns: Follow specific rules (e.g., "child" → "children", "mouse" → "mice").
5. Some nouns remain the same in both singular and plural (e.g., "deer" → "deer").

Solution:

#### Column 1:
1. planet → planets
2. disc → discs
3. keyboard → keyboards
4. glass → glasses
5. song → songs
6. beach → beaches
7. connection → connections
8. book → books
9. bush → bushes
10. dinner → dinners
11. panel → panels
12. apostrophe → apostrophes
13. kiss → kisses
14. cabinet → cabinets
15. charm → charms
16. window → windows
17. girl → girls
18. professional → professionals

#### Column 2:
19. icon → icons
20. staple → staples
21. airplane → airplanes
22. mouth → mouths
23. church → churches
24. witch → witches
25. building → buildings
26. file → files
27. hex → hexes
28. elephant → elephants
29. computer → computers
30. jackhammer → jackhammers
31. dish → dishes
32. club → clubs
33. word → words
34. horse → horses
35. whiteboard → whiteboards
36. nose → noses

Final Answer:

\[
\boxed{
\begin{array}{ll}
(1) \text{planets} & (19) \text{icons} \\
(2) \text{discs} & (20) \text{staples} \\
(3) \text{keyboards} & (21) \text{airplanes} \\
(4) \text{glasses} & (22) \text{mouths} \\
(5) \text{songs} & (23) \text{churches} \\
(6) \text{beaches} & (24) \text{witches} \\
(7) \text{connections} & (25) \text{buildings} \\
(8) \text{books} & (26) \text{files} \\
(9) \text{bushes} & (27) \text{hexes} \\
(10) \text{dinners} & (28) \text{elephants} \\
(11) \text{panels} & (29) \text{computers} \\
(12) \text{apostrophes} & (30) \text{jackhammers} \\
(13) \text{kisses} & (31) \text{dishes} \\
(14) \text{cabinets} & (32) \text{clubs} \\
(15) \text{charms} & (33) \text{words} \\
(16) \text{windows} & (34) \text{horses} \\
(17) \text{girls} & (35) \text{whiteboards} \\
(18) \text{professionals} & (36) \text{noses} \\
\end{array}
}
\]