英语中的复合形容词 这些怎么说英语中的复合形容词she is a five-year-old girl不用复合的话 不用she is five years old的话 怎么说是不是 she is a five years old's girl 那如下这些怎么说 a five-pound notea six-foot-deep holea ten-story-high buildinga 100-meter race

可以说She is a girl aged 5.

She is five years old.正确
She is five-year old.正确
而下面的你所说的一般不会不复合 就是一般都复合
如果不复合 则改为
a five pounds note
a six feet deep hole
a ten stories high building
a 100 meters race

she is a five-year-old girl-> she is a girl at her age of 5she is a girl aged 5a five-pound note-> a note valued five poundsa six-foot-deep hole-> a hold with a depth of six feeta ten-story-high build...

she is a five years old's girl ？这样是错的，要注意's是“的”的意思，但别受汉语影响，这里的“的”指的是所属关系，即“属于…的”，叫做名词所有格，只能用在名词后，如Tom's是指“汤姆的”。
其实she is five 就可以了，如果不够，那就用定语从句，如she is a who is five years old.这样其实太麻烦。
下面不知你什么意思，就举一例吧
the note is five pounds .