The content clause in [ⅲ] is introduced by the subordinator that, but the rest of the clause does not differ from that of the main clause These people had been invited. (Huddleston & Pullum, 2005, p. 175)
该怎么理解?differ from that 中的 that 又指代什么呢?
例【iii】为:I don’t think that these people had been invited.