Generate the answer for a given question. The question requires common knowledge of English. Make sure that the answer is in detail, long, consistent with the context, and requires general knowledge of English. To be less repetitive, please vary your language for each question. Give a proper explanation to answer, and if necessary, provide the definition of various terms. And conclude your answer if it's long. If you have used other resources (e.g., Merriam Webster's.) to answer the question, include citations in your answer. You don't need to paraphrase the context of your resources, but make sure that your answer is consistent and complete.

Q: I've been looking around the Internet. Some websites say that foods is incorrect but others say it is correct.

A: Food in its commonest sense is a non-countable noun, with all the effects of that. It's already a plural. You would eat 'some food' not 'a food'. You would say 'less food' not 'fewer foods'. However, there is a less common usage where 'a food' means 'a type of food': 'Cheese is a food made from milk' ... and in this form, you can pluralise it ... 'Italy is the source of many delicious foods -- pizza, pasta, salami, biscotti...' For comparison, think of 'a people' - Are there meta-plurals beyond 'peoples'?
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Q: When telling a story about myself from the past, I have found myself in an internal debate over whether the correct way to segue into the present is: That was me twelve years ago. Or: That was I twelve years ago. My instincts tell me the first is correct (object pronoun after a verb and it sounds better to my ears). But, I'm not sure if pronouns after linking verbs should be object pronouns. Which is correct?.

A: Professor Geoffrey Pullum has this to say: Myth: Expressions like 'It was me' and 'She was taller than him' are incorrect; the correct forms are 'It was I' and 'She was taller than he.' Pullum responds: The forms with nominative pronouns sound ridiculously stuffy today. In present-day English, the copular verb takes accusative pronoun complements and so does 'than.' My advice would be this: If someone knocks at your door, and you say 'Who's there?' and what you hear in response is 'It is I,' don't let them in. It's no one you want to know. 'People have been living in fear of grammar rules that don't exist,' said Pullum, who wrote The Cambridge Grammar with Rodney Huddleston of the University of Queensland, Australia. 'We're going into the 21st century carrying grammar books from the 20th century that haven't shaken off grammar myths from the 19th century,' said Pullum.
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Q: This is a question for English wordsmiths. Is there a word that 'feels' like the word 'ethereal' that means something ethereal that quickly disappears. Or is 'ethereal' the correct word choice for this? Ethereal was the first word that popped into my head for this. From the various definitions that I've looked at for ethereal, it says delicate, beautiful, heavenly, etc. but not necessarily quickly vanishing, except for the secondary definitions related to ether that suggests it evaporates. I'm just wondering if there is a better word than this. I'm using the term 'ethereal skill' to describe a certain type of pilot skill (instrument flying) that requires tremendous practice to achieve proficiency, and once proficiency is achieved it is a beautiful thing, but if you don't practice it regularly, that skill vanishes after a few weeks. USAGE: Instrument proficiency is an ethereal skill that once obtained must be maintained through constant and regular practice.

A:
You are probably looking for the word ephemeral. ephemeral: Lasting for a very short time.
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