All my ___ have to be removed. (Tooth)

Select the correct plural noun from the given singular form of the noun

Answer: B. Teeth

In English grammar, tooth is an irregular noun, meaning it does not follow the standard rules for pluralisation. The correct plural form of tooth is teeth, not tooths or any possessive variation. So, the correct sentence is: “All my teeth have to be removed.”

🧠 Why is Teeth the Correct Answer?

Tooth is one of several nouns in English that change their internal spelling when forming the plural. This pattern of vowel change in irregular nouns often comes from Old English roots, and learners must memorise these cases rather than apply a general rule.

Singular	Plural
tooth	teeth
foot	feet
goose	geese
man	men
woman	women

So, just like “foot” becomes “feet,” “tooth” becomes “teeth.”

❌ Why Are the Other Options Incorrect?

A. Tooths: This is a common mistake. Regular nouns may take “-s” to form the plural, but “tooth” is irregular and does not follow this pattern.

C. Teeth’s: The apostrophe-s (’s) indicates possession, not plural. “Teeth’s” would incorrectly imply ownership, e.g., “The teeth’s color is white,” which is grammatically awkward and incorrect.

D. Tooth’s: This is the possessive form of the singular “tooth.” For example, “The tooth’s root was infected.” It is not a plural form.

To correctly complete the sentence: “All my ___ have to be removed.” Select the correct plural noun (i.e., option B. teeth) from the given singular form of the noun. 

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