Singular/Plural Nouns - English - Notes - Teachmint - Free Printable

Task: Solve the problem of converting singular nouns to plural forms and vice versa based on the rules provided in the image.

#### Rules Recap:
1. For nouns ending in "Y":
- If the noun ends in a consonant + Y, change "Y" to "I" and add "ES."
- Example: fly → flies
- If the noun ends in a vowel + Y, simply add "S."
- Example: holiday → holidays

2. For nouns ending in "F" or "FE":
- Change "F" or "FE" to "V" and add "ES."
- Example: shelf → shelves
- Example: life → lives

3. Converting plurals back to singulars:
- Reverse the above rules:
- Plurals ending in "IES" (from "Y") become singular by removing "IES" and adding "Y."
- Plurals ending in "VES" (from "F" or "FE") become singular by removing "VES" and adding "F" or "FE."

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Step 1: Convert Singular Nouns to Plural Forms

#### Nouns Ending in "Y":
- lady: Ends in a consonant + Y → Change "Y" to "I" and add "ES."
- Plural: ladies
- toy: Ends in a consonant + Y → Change "Y" to "I" and add "ES."
- Plural: toys
- country: Ends in a vowel + Y → Simply add "S."
- Plural: countries
- party: Ends in a consonant + Y → Change "Y" to "I" and add "ES."
- Plural: parties
- copy: Ends in a consonant + Y → Change "Y" to "I" and add "ES."
- Plural: copies
- fairy: Ends in a vowel + Y → Simply add "S."
- Plural: fairies
- key: Ends in a consonant + Y → Change "Y" to "I" and add "ES."
- Plural: keys

#### Nouns Ending in "F" or "FE":
- knife: Ends in "F" → Change "F" to "V" and add "ES."
- Plural: knives
- loaf: Ends in "F" → Change "F" to "V" and add "ES."
- Plural: loaves
- shelf: Ends in "F" → Change "F" to "V" and add "ES."
- Plural: shelves
- half: Ends in "F" → Change "F" to "V" and add "ES."
- Plural: halves
- elf: Ends in "F" → Change "F" to "V" and add "ES."
- Plural: elves
- leaf: Ends in "F" → Change "F" to "V" and add "ES."
- Plural: leaves

#### Other Nouns:
- army: Does not end in "Y" or "F/FE" → Simply add "S."
- Plural: armies

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Step 2: Convert Plural Nouns to Singular Forms

#### Plurals Ending in "IES" (from "Y"):
- families: Ends in "IES" → Remove "IES" and add "Y."
- Singular: family
- calves: Ends in "VES" (from "F") → Remove "VES" and add "F."
- Singular: calf

#### Plurals Ending in "VES" (from "F" or "FE"):
- lives: Ends in "VES" (from "F") → Remove "VES" and add "F."
- Singular: life
- cities: Does not follow the "F/FE" rule → Simply remove "ES."
- Singular: city

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Final Answers:

#### Part 1: Singular to Plural (Ending in "Y")
- lady → ladies
- toy → toys
- country → countries
- party → parties
- copy → copies
- army → armies
- fairy → fairies
- key → keys

#### Part 2: Singular to Plural (Ending in "F" or "FE")
- knife → knives
- loaf → loaves
- shelf → shelves
- half → halves
- elf → elves
- leaf → leaves

#### Part 3: Plural to Singular
- families → family
- lives → life
- calves → calf
- cities → city

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Boxed Final Answer:

\[
\boxed{
\begin{array}{ll}
\text{lady} \rightarrow \text{ladies} & \text{copy} \rightarrow \text{copies} \\
\text{toy} \rightarrow \text{toys} & \text{army} \rightarrow \text{armies} \\
\text{country} \rightarrow \text{countries} & \text{fairy} \rightarrow \text{fairies} \\
\text{party} \rightarrow \text{parties} & \text{key} \rightarrow \text{keys} \\
\text{kilnife} \rightarrow \text{knives} & \text{half} \rightarrow \text{halves} \\
\text{loaf} \rightarrow \text{loaves} & \text{elf} \rightarrow \text{elves} \\
\text{shelf} \rightarrow \text{shelves} & \text{leaf} \rightarrow \text{leaves} \\
\text{families} \rightarrow \text{family} & \text{lives} \rightarrow \text{life} \\
\text{calves} \rightarrow \text{calf} & \text{cities} \rightarrow \text{city} \\
\end{array}
}
\]