What is the plural of interrogative words (what, who, where, when, how, why, etc.)
If interrogative words are used as nouns, how are they pluralized?
Example: This will answer your hows and whys.
What is the correct form?
- whys (the same as most English words?)
- why's (following the rationale of pluralized acronyms?)
- why (they cannot be pluralized?)
They are pluralised adding the -s at the end of the word: why/whys, how/hows, etc.