I think the answers are in your post Let’s look at your first sentence From the report, it looked as if he played a crucial role in smuggling. This is the subjunctive about the present . From the report, it looked as if he played a crucial role in smuggling (But he does not play any crucial role in smuggling, or we don’t know whether he does or not) The past subjunctive can be used similarly after as if / as though to indicate unreality or improbability or doubt in the present (there is no difference between as if and as though) He behaves as if he owned the place ( But he doesn’t own it or probably doesn’t own it or we don’t know whether he owns it or not) He talks as though he knew where she was (but he doesn’t know or he probably doesn’t know or we don’t know whether he knows or not) He orders me about as if I were his wife (But I am not).
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