Thanks, Jo.... I wrote my post way too fast early this morning and am not going to go back and correct it in the hope that no one but you and William saw it ... I forgot to include present perfect. That would make a total of seven common tenses. But still yes, I agree with you and your source, we have all those tenses (continuous = progressive). Doesn't matter how they are constructed - each refers to a different time frame and therefore must be considered a tense. Now, I thought pluperfect was the same as past perfect ... and your example "I wish I were king" was subjunctive mood. Homework time.....

Has anyone ever studied the Hopi language? No tenses at all.

William, again it doesn't really matter how the future tense is constructed, it exists as a tense. "Might" is a modal and not properly a tense (getting a headache now). I'd like to hear from one of our German-speaking interlocutors on this. That language has is all sorted out.