1）不定代词all,more,some,any,none作主语，谓语动词视情况而定
2）the rest of /half of/part of/majority of/percent of/one third of 句中加名词作主语，谓语动词“与of后面的名词保持一致”
3）集合名词作主语，动词可用单数，也可用复数，强调整体用单数，指全体人员，动词用复数。（public,family,class,crowd,population,team ,group)
4)复合不定代词作主语，谓语动词要用单数，如someone,somebody,somthing ,anybody,anything,everybody,everything,everyone,nobody,no one,nothing.
5)一些总是以复数出现，成双成对的事物 如 trousers，shoes,glasses,gloves等，
前面有a/this/that pair of 修饰，谓语用单数
