他十岁了的英文应该是he is a 10 years old还是he is 10 years?

他十岁了的英文应该是he is a 10 years old还是he is 10 years? He is a sixteen-years-old boy He is a of twelve years old Is he( ) 14 years old? He is twelve years old. he knows a lot () he is only eight years old 英语翻译还有,“他四岁”是说he is four years old还是he is four year old? 英语修改句子 He is more than 10 years old 问：Peter is a boy.he is 15 years old. Tommy is a boy.He is 8 years old. He is eleven years old,对eleven years old, he is one ---- old .横线上填year还是years