问：Peter is a boy.he is 15 years old.

Peter is a boy ,he is 15 years old.彼得是一个男孩,他15岁
Peter is a 15-year-old boy.同意句转换,两句合为一句：彼得是一个15岁的男孩.15-yaer -old分别用连词符连接表示15岁的,year,old都不能加s.
Joey is dressed in red clothes.
Joey is in red clothes.dress=in 表示穿着
My uncle owns the big house.我叔叔拥有这个大房子,own：拥有
The big house belongs to my uncle.belong to表示属于 这间大房子属于我叔叔.