twelve years old twelve year old twelve—years—old twelve—year—old 有什么区别twelve years oldtwelve year oldtwelve—years—oldtwelve—year—old有什么区别

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twelve years old twelve year old twelve—years—old twelve—year—old 有什么区别twelve years oldtwelve year oldtwelve—years—oldtwelve—year—old有什么区别
twelve years old twelve year old twelve—years—old twelve—year—old 有什么区别
twelve years old
twelve year old
twelve—years—old
twelve—year—old
有什么区别

twelve years old twelve year old twelve—years—old twelve—year—old 有什么区别twelve years oldtwelve year oldtwelve—years—oldtwelve—year—old有什么区别
我可以帮您解答
您第二个和第三个词组都是错的,我们不这样说的.只有第一个和最后一个正确.
twelve years old 是一般的词组,没有特性的规定,例：
1、I am twelve years old.
2、He must be twelve years oid.
而twelve-year-old则是一个形容词,用来修饰名词.例：
1、He is a twelve-year-old boy.
2、This is a twelve-year-old tree.

不好意思啊，我只知道第一个和最后一个是相同意思的，都是表示12岁，不过最后一个是形容词，第一个是名词词组

He is twelve years old. I am twelve years old. l am twelve years old She is twelve years old.意思 He is twelve years old 提问 求翻译：she is twelve years old. I am twelve years old 英语疑问句 Tom is twelve years old.就画线部分提问提问是twelve years old 改为复合句：Tom is twelve years old.Linda is twelve years old ,too.Tom is ()()()Linda I’m twelve years old.对画线部分提问,画线是twelve years old Tony is twelve ( )old.year years ,Tony is twelve ( )old.year years ,包括语法, The boy is twelve years old对twelve years old提问 My sisther is twelve years old,对twelve years old提问 old ,twelve, li lei, old years is .连词成句 连词成句 old,twelve,Li Lei,old years Lucy and Lily are both ________ girls．A.twelve years old B.twelve year old C.twelve-years-old D.twelve-year-old twelve years old twelve year old twelve—years—old twelve—year—old 有什么区别twelve years oldtwelve year oldtwelve—years—oldtwelve—year—old有什么区别 twelve-year-old与twelve years old的区别及用法