Hi Taka, (a) If such a thing were to happen, what shall we do? (b) If such a thing should happen, what shall we do? You might say there is not much difference between them.
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CliveI still think number two hints at a bit more possibility.What do you think makes you think that way? Because of an urgent impression implied by 'should' or something?
Clive I don't think imminent death is an excuse for using language imprecisely, do you?