动词用单数形式,因为这一类单词包括someone某人,anyone任何人,nobody没有人做主语,谓语动词都需要用单三形式。
拓展:
谓语动词用复数的特殊情况:a number of+可数名词复数做主语,谓语动词与可数名词复数保持一致,即A number of flowers are beautiful.一些花很好看;a series of做主语,谓语动词也用复数形式,A series of books are written by him。
谓语动词用单数的情况:the number of+ 可数名词复数或不可数名词,译为什么什么的数量,短语做主语时,谓语动词一律用单三形式。而 a piece/kind/pair of+名词,通常情况下视为单数。A piece of bread is what he wants他想要一块面包,A kind of these colors is what she likes她喜欢其中的颜色之一,A pair of gloves is what she need她需要的是一双手套。
多个并列结构做主语,如both and,all等做主语,动词用复数形式;而as well as,together with,with,etc做主语,通常与前面的名词保持一致;而either or,neither nor等固定结构中,通常与最远的名词保持一致。Both he and I like apples我和他都喜欢苹果,He,as well as I likes playing football我和他喜欢踢足球,Either my teachers or my mother was invited to join in the meeting.我的老师或我的母亲被邀请出席这次会议。此外,如果有none of等词,也用复数形式。
以上是几种用法,希望有帮助。