some of the children 是单数还是复数
some of the children 是单数还是复数
the children each是单数还是复数
children 做主语是单数还是复数
to some children 做主语 后面的谓语动词用是单数还是复数?
what is the sex of your children?后面是children复数,前面为何用单数is?
one of neither of all of some of 加 them 是单数还是复数
some water是单数还是复数?
some food是单数还是复数?
some one 是单数还是复数
the boys of Class One是单数还是复数?
the amount of 的谓语是单数还是复数
"half of the money"是单数还是复数