<p>"I put "Were we to change". By changing doesnt seem to go well with "we MIGHT HAVE". (which I'm pretty sure it was) Might have indicates subjunctive, and I think it has to be "were we to". Anyway, I think this section was experimental?"</p>
<p>It did not seem experimental ... </p>
<p>Also, "we might have" implies the pluperfect subjunctive only if there's a participle following it ... and I don't recall one. (i.e. "we might have difficulty" doesn't count ... ) </p>
<p>Might, like "could" (both of which, not too surprisingly, are the past inflection of deponent verbs signifying "to be able to"), can be both past subjunctive, past indicative, or just plain modal auxiliaries. </p>
<hr>
<p>*We might go to the bank.<a href="subjunctive%20in%20origin%20for%20social%20reasons,%20in%20order%20to%20soften%20the%20%22force%22%20of%20a%20sentence,%20effectively%20indicative%20in%20function">/I</a></p>
<p>c.f. "could you do it" versus "can you do it"; both are indicative in function but the former is subjunctive in origin.</p>
<p>*Fearing the enemy might attack along the left flank, the general split his artillery guard into two. <a href="%22past%20tense%20of%20then%20future%20action%22">/I</a>
He said he might go to the bank => he said he was going to the bank. </p>
<p>cf. "Remember how the government said they would give (were going to give) an award of 20,000 dollars for information leading to his capture? They've rescinded the offer!" </p>
<p>*
He might have done it.<a href="Indicative">/I</a> </p>
<p>*Even if you were able to rob a bank, you might not even be able to get cash in your money without getting caught.<a href="subjunctive">/I</a></p>