some of 单数还是复数some of 是单数还是复数?突然一下忘记了

some of 单数还是复数some of 是单数还是复数?突然一下忘记了 some baskets of orange(s) 用单数还是复数 some of the children 是单数还是复数 some water是单数还是复数? some one 是单数还是复数 do some practice还是do some practices单数还是复数? one of neither of all of some of 加 them 是单数还是复数 请问there is some piece of paper中be动词用单数还是复数 piece呢? some of 后面加的be动词是单数还是复数 英语中a bag of +可数名词的复数还是单数,那some bags of +可数名词的单数还是复数,有什么规律可循? money一词是复数还是单数some money是复数还是单数呢 some people做主语,谓语动词用单数还是复数? some people做主语,谓语动词用单数还是复数? some other 后面应该加名词单数还是复数? some后加可数名词的复数还是单数 need some help的help是复数还是单数 have some difficulty 是用单数还是用复数 some+不可数 谓语动词用单数还是复数?