two thirds 与two-thirds 都正确吗带不带连字符都正确吗

都正确..
two thirds 基数词表分子,序数词表分母,当分子大于一时,分母要用复数
two-third是复合形容词,形容词没有复数形式
eg:
The bottle is two thirds full.
这瓶子三分之二满。
We had two-thirds of a cake.
我们有三分之二个蛋糕。
nonvenomous snakes; about two-thirds of all living species.
无毒蛇；约占所有现存蛇类的三分之二。
Of the 16,000 faculty members, two-thirds were * teachers.
教职工达1.6万人，藏族教师占三分之二。
Two thirds of the entering freshmen stayed to graduate.
三分之二的入学新生坚持到毕业
That building is two- thirds as tall as this one.
那座楼房的高度是这座楼房的三分之二。
She expect to achieve the requisite two-thirds majority for nomination.
她期望得到获得提名所必需的三分之二多数。
Gate money accounts for only two thirds of the club's income.
票房总收入只占俱乐部收入的三分之二。

都正确

two thirds 基数词表分子,序数词表分母,当分子大于一时,分母要用复数
two-third是复合形容词,形容词没有复数形式
Two thirds of the students will take part in that sports meeting.
Two-third students will take part in that sports meeting.

中间"-"可要可不要.

都正确的，是“三分之二”的读法，但two-thirds需要注意区别，有的学生会误以为符号“---”后面都是跟复数。当基数词+名词合成做定语的时候，名词要单数，如：a five-year plan, a three-month old baby 。

two thirds
two-third

two thirds
two-thirds
都正确

个人认为加连字符的是作为形容词