首先我们来看下five years old和five-year-old的大致意思:
five years old:词性为短语,five(五) + years(年) + old(的)
five-year-old:词性为形容词,five-year(五年的) + old(的)
通过下面的表格我们了解下five years old和five-year-old的含义、发音和用法
接下来让我们看下five years old和five-year-old的用法区别:
1.词法结构:在词法结构上,'five years old'是一个名词短语,而'five-year-old'是一个形容词。
例子:
- a five-year-old girl
(一个五岁的女孩)
- the five-year-old cat
(那只五岁的猫)
2.连字符:'five years old'是由三个单词组成,没有连字符连接;而'five-year-old'是一个由连字符连接的形容词。
例子:
- a five-year-old company
(一个有五年历史的公司)
- the five-year-old car bought five years ago
(那辆五年前买的车)
3.名词与形容词:'five years old'中的'years'是名词复数,'old'是形容词;而'five-year-old'整体作为形容词来修饰名词。
例子:
- a batch of five-year-old books
(一批五年历史的书籍)
- a five-year-old student in the fifth grade
(一个五年级的学生)
4.修饰范围:'five years old'修饰整个范围,指的是一个时间段为五年的人或事物;'five-year-old'修饰后面的名词,指的是年龄为五岁的人或事物。
例子:
- a five-year old plan
(一个五年规划)
- the plan made five years ago
(那个五年前制定的计划)