half a year 和a half years.和half year哪个正确..为什么还有1.one and a years 2.one and half year.3.one and half years.4one half and one year哪个对的..也说明一下.好乱哦~.还有英语分数表达中间加不加连字符有什么区别

问题描述:

half a year 和a half years.和half year哪个正确..为什么
还有1.one and a years 2.one and half year.3.one and half years.4one half and one year哪个对的..也说明一下.好乱哦~.
还有英语分数表达中间加不加连字符有什么区别

half a year 正确,意为半年.与此类似的搭配例子还有我们最常见的half an hour(半小时)
第二个问题:one and half year为正确表达,一年半
英语分数表达,中间加上连字符的话可将前后两词连为一个独立结构,在句子中起到形容词的作用.例子:he is a two-year-old boy.

half a year
one and a half years

half a year半年,因为半年小于一年,所以year后面不加s
one and half years一年半,因为一年半大于一年,所以year后面加s
这些是一些固定的搭配,暂时没能想到从语法上分析为什么是half a year,而不是half year,不好意思

half a year正确.
one and a half years应该是这样表达
加不加没区别的

half a year是正确的
另外一年半应该是one and half years

half a year