■ it is (Xs) that (who) …

这是英文常用的强调句。值得注意的是：无论 X 是单数还是复数，it is 是单数不变，that (who)后面的谓语动词则随 X 的单复数。

• Among the British scholars it is especially Professors Sir Randolph Quirk, Sidney Greenbaum and Geoffrey Leech who have urged me to present such a synthesis. (Jan Firbas, Functional Sentence Perspective in Written and Spoken Communication, p. xi)英国学者当中，奎可爵士、格林鲍姆和李奇等三位教授敦促我拿出这份综合材料。