Select the correct plural form for the given word: Roof

Most English nouns form their plural by simply adding -s. A smaller group of nouns ending in -f or -fe instead shifts the f to v and adds -es (or -s for -fe words), such as:

• Regular pattern: add -s (e.g., book -> books)

• -f/-fe -> -ves shift pattern: leaf -> leaves, half -> halves, knife -> knives

This shift is not universal — many -f-ending nouns simply add -s instead: chief -> chiefs, cliff -> cliffs, proof -> proofs.

'Roof' belongs to this regular group. It does not undergo the f-to-v shift, so its plural is formed the standard way, by adding -s.

Checking against the pattern confirms this: the f-to-v shift applies only to a specific, limited set of words (mostly those like leaf/knife/half/wife), and 'roof' is documented among the exceptions that keep the regular -s plural rather than shifting to -ves.

So the correct plural form of 'Roof' is Roofs.