people 指人时谓语动词用复数,指一个民族时,用单数。例:This people shares characteristics with certain inhabitants of central Asia.
cattle, police, mankind 谓语动词用复数。
staff 美国英语谓语动词用单数。例:The hotel staff was friendly.美语
英国英语谓语动词多用复数,偶尔也有用单数的。
例:The teaching staff are/is well-qualified and experienced.(英国英语)
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