Rule 5
If a singular noun ends in o, the plural is usually formed by adding es.
Examples:
| Singular | Plural | Singular | Plural | Singular | Plural |
|---|---|---|---|---|---|
| tomato | tomatoes | cargo | cargoes | ||
| potato | potatoes | volcano | volcanoes | ||
| hero | heroes | echo | echoes |
Common exceptions:
Some words ending in o form the plural buy adding s (eg: piano - pianos )
Other words are:
| kimono | soprano | studio | cello | radio |
| avocado | fiasco | merino | video | photo |
Either s or es can be used with these words:
| dingo | halo | mosquito | grotto | buffalo |
| zero | mango | motto | flamingo | ghetto |
