英语用法之分数连字符何时用?书中a third,two-thirds,three quarters；a quarter,

英语用法之分数连字符何时用?书中a third,two-thirds,three quarters；a quarter, 为什么 a four-year-old boy中的year可以不加复数,而分数two-thirds中连字符后的third 英语小问题三分之二用英语怎么说?中间有连字符的那种.two-third还是two-thirds?可是有连字符不是就变成形 a three-quarter majority和a two-thirds majority,为什么quarter后不加 two third 2/3如果加了连字符是不是two—thirds?加了连字符third为什么加了s?一般连字符表示数字 英语分数表示方法三分之二,two thirds一定是对的,但是我要是加连字符呢?是two-thirds还是two-thi Nowadays___[two third/two thirds/two three/second three] of A. third threes B. three third C. thirds three D. three thir 四分之三A) three quarters B)three-quarter C)three fourths 选A,为什么 three quarters of a million or one and three quarter million 三分之二表示two thirds ,中间加连字符吗? 英语中用名词所有格和用连字符的区别?如 a two day"s holiday a two-day holiday