Final answer:
The subject of this question is irregular plural nouns in English. The provided sentences require the correct plural forms of certain words.
Step-by-step explanation:
The subject of this question is irregular plural nouns. In English, the plural form of a noun can change in an irregular way, and it is important to understand these irregularities to use them correctly in sentences.
For the provided sentences:
- The plural form of 'child' is 'children', so the correct sentence is 'The children come to the park.'
- The plural form of 'foot' is 'feet', so the correct sentence is 'Your feet have grown; you need new boots.'
- The plural form of 'person' is 'people', so the correct sentence is 'Many people will attend the show.'
- The word 'books' is already in its plural form, so the sentence is correct as it is.
- The word 'casserole' does not require a plural form as it is a mass noun, so the sentence is correct as it is.
Learn more about Irregular plural nouns