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Modals Hypothetical past situation. Read the following dialogue attentively. Sue: Where’s Alec , I wonder ? We ought to have started fifteen minutes ago. Phil: He may have lost his way . It isn’t very easy to find this place . Sam: We should have come here together .
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Readthefollowing dialogue attentively. Sue: Where’sAlec, I wonder? Weought to havestartedfifteen minutes ago. Phil: Hemayhavelosthisway. Itisn’tveryeasy to findthisplace. Sam: Weshouldhave come heretogether. Sue: Hecouldhaveforgottenallaboutit, I suppose. Kay: Hecan’thaveforgotten, I remindedhimonlythismorning. Phil: Well, somethingmust havedelayedhim.
Sue: Where’sAlec, I wonder? Weoughttohavestartedfifteen minutes ago. MORAL OBLIGATION Phil: Hemayhavelosthisway. Itisn’tveryeasy to findthisplace. PROBABILITY
Sam: Weshouldhave come heretogether. WHEN SOMETHING WAS THE BEST THING TO DO Sue: Hecouldhaveforgottenallaboutit, I suppose. POSSIBILITY
Kay: Hecan’thaveforgotten, I remindedhimonlythismorning. IMPOSSIBILITY (LOGICALLY IMPOSSIBLE) Phil: Well, somethingmusthavedelayedhim. LOGICALLY TRUE