To fill in the blanks, the answers are: sheep, children, antennae, toothbrush, mice, and footprints. Make sure to use the correct plural forms where applicable and note that some words are irregular nouns. Always remember that some nouns have unique pluralizations, like 'child' to 'children' and 'mouse' to 'mice'.
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To fill in the blanks with the correct form of the noun, we need to use the plural form where necessary. Plurals often involve changing the form of the singular noun depending on certain patterns and rules:
Sheep - The plural of 'sheep' is 'sheep'. It is an irregular noun because it does not change form when pluralized.
Children - The plural of 'child' is 'children'. This is another irregular noun that does not follow the usual 'add an -s' rule.
Antennae - The plural of 'antenna' can be either 'antennas' or 'antennae'. 'Antennae' is often used when referring to insects' feelers, while 'antennas' can be used for radio or TV equipment.
Toothbrushes - The plural of 'toothbrush' is 'toothbrushes'. You add -es to make it plural since it ends with 'sh'.
Mice - The plural of 'mouse' is 'mice'. This is an irregular plural form that does not follow the standard rules.
Feet - The plural of 'foot' is 'feet'. It's another irregular noun that changes form completely.
Overall, English nouns can be made plural in various ways. Regular nouns are usually made plural by adding -s or -es. However, many nouns are irregular and need to be memorized as they do not follow these standard rules.