复数直接加s,Negro的复数：Negroes n.黑人
记忆技巧：negr 黑 + o 表人 → （带歧视含义）黑人
例句：
The issue of equal rights for American Negroes is such an issue.
赋予美国黑人平等权利就是这样一个问题。
I was going to take some root beer over to the negroes.
我正准备给黑人拿些草根啤酒去。
Research on the Negroes to Macao in the Period of Ming and Qing
明清时期澳门黑人问题研究
