他20岁,是he's twenty year old还是he's twenty years old
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他20岁,是he's twenty year old还是he's twenty years old
他20岁,是he's twenty year old还是he's twenty years old
他20岁,是he's twenty year old还是he's twenty years old
he is a twenty-year old youngman
he is twenty years old
注意区别 前一个用单数 前置
he's twenty years old
he's twenty years old
he is 20 years old
he is a 20-year-old man
He is twenty years old.
He is twenty-year-old.
he's twenty years old
He is twenty years old.
he's twenty years old
当然是 he's twenty years old 才对。year 是可数名词,而且已经超过1,所以要+s。
he's twenty years old