Kemeny and Kurtz's BASIC was an ahead-of-time compiled language which ran on time-shared machines; mainframes at first then smaller "mini"-computers. The typical interpreted BASIC for microcomputers was quite a bit simpler than that.

Pretty sure linguistically the important bit is "when" and the "they" is not defined

Like when awaiting pizza delivery, "they're here in 10 mins" doesn't directly relate to a specific guy

Could be wrong though

And no, to answer your question