Hi Guest, All indeed acceptable, and dependent on the nuance you wish to communicate. This is a question I really should leave to California Jim, but I will get a start on it by presenting some loosely-quoted extracts from the viewpoints of Michael Lewis: 1. ' This form uses a modal: this sentence expresses the speaker's judgment of the probability of the future event based on the situation at the moment of speaking (as opposed to 'may/might/could/should/'etc).
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