it is what she want to say.用单数还是复数?

it is what she want to say.用单数还是复数?
It is what she want to say.这句话没有错误吗?want 后面是不是要加s?
那这句呢?-----It is what ADULT WEKK want to say.
ADULT WEKK 是一个组织.
want后面要加s吗?