SHOULD

Should can be used after in case to emphasisSpecial importance or attention given to something. E.g.: All I wanna do is have some fun.e unlikelihood. This use is rather formalNot belonging to colloquial or everyday speech; official. E.g.: I demand that Mr Smith call the person on whom the committee has decided. or may even sound archaic to some speakers.

I'm taking a book with me in case I should get bored.

With be and adjectiveA part of speech that modifies, qualifies or restricts a noun or a pronoun. E.g.: The apples are ripe. ("ripe")s (e.g. odd, strange, funny) and with the expressionA word or group of words used in a particular situation. E.g.: Good morning, at six, on the sofa What a coincidence... we use should  to describe chance. 

It's strange that you should be living in the same block of flats and we've never met.

WERE TO

In hypotheticalUnreal, imagined. present situations we can use were to to express that the eventA general term expressing that somebody or something does something or that something happens. E.g.: An apple fell on Isaac’s head. is very unlikely to happen.

If he were to ask you to marry him, what would you say?

Modals expressing past unlikelihood
Unlikelihood with modals Willingness / unwillingness with modals

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