Everyone是单数还是复数?people是单数还是复数?childern是单数还是复数?who是单数还是复数?

题目

Everyone是单数还是复数?people是单数还是复数?childern是单数还是复数?who是单数还是复数?
如果他们后写"有"（have),哪些用have,哪些用has?

答案

everyone用单数has
people是集合名词用复数have
children是复数用have child才是单数
who用has