Before you start, answer the following question test

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A noun that remains the same in both singular and plural forms.

A noun that changes its spelling completely when made plural.

A noun that has been changed from singular to plural by adding -s or -es.

By changing the “y” to “i” and adding -es

By changing the “f” or “fe” to “v” and adding -es

By removing the “f” or “fe” and adding -ed