- In the framework of Question word + preposition + object pronoun + verb,
should the verb be singular or plural (ie grammatical number)?
2. Here, the subject is what, but its numerosity is unknown because what can refer to one or many objects. So how can we determine the grammatical number of the verb?
3. What's this concept called?
4. What general lesson oversees/overrides this question? I want to learn about the bigger picture.