five years old 五岁
five-year-old 五岁的
例如：He is five years old.
He is a five-year-old boy.
five years old例句：
He was only five years old then.
当时他才五岁。
His father died when he was five years old.
他五岁上死了父亲。
Mozart began composing when he was five years old.
莫扎特五岁就开始作曲了。
He's five years old today.
今天他五岁了。
My friend and I have been good friends since we were five years old.
我和我的朋友自从五岁时就是好朋友了。
five-year-old例句：
Yes, I am and I have got a five-year-old daughter.
是的，我结婚了，还有一个五岁的女儿。
My five-year-old son was not picking up his toys while I was preparing dinner as I had askedhim. 在我做晚饭时，我要求我五岁的儿子把他的玩具收拾起来，但是他没做。
Can it be true that he was fooled by a five-year-old boy?
他被一个五岁的孩子愚弄了，这能是真的吗？
She laughed and said that my five-year-old, Anna, was much better.
侯阿姨笑了，说我五岁的女儿安娜（Anna）都比我包得好多了。
A five-year-old daughter and a newborn son.
一个五岁的女儿和出生不久的儿子。