In what case is case used as a noun? In What case is is case an infinitive?

Question

A "case" names a physical, tangible thing. (the, a,) precede it. To plus an infinitive is one example.

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Answer 1

The noun "case" will be referring to a situation, a problem, an example, or a series of events. Examples of "case" as a noun:

1. Legal or medical situation: "My court case begins next week," or "The doctors are working hard on this case, but it's very difficult."
2. Other situations/logistics: "I'll give you my extra car key in case I lose mine while I'm traveling."
3. New information/changing situation: "I didn't realize these sweaters were on sale! In that case, I'm going to buy two."
4. Objects: a variety of protective boxes or covers, such as suitcase, briefcase, pencil case, CD or video case, makeup case, eyeglass case, etc. This includes larger items, like a bookcase, fireproof case, gun case, instrument case, and so on.

I believe there's only one example of "case" as an infinitive verb:

1. to case a joint: a slang phrase made popular in gangster movies from the 1930s, meaning to closely inspect a place ("joint" meaning a club or bar) with the intention of robbing it. The idea is to see how easy or difficult it would be to rob the place and get away.

Answer 2

To case the joint is slang. The infinitive "to case" means to look at someplace for robbery.

A case means an object, a glass container or a physical holder or an abstract noun used by a lawyer.