seven-year-olds
3个回答

seven-year-old 的汉语意思:7岁大或7岁了.恕我直言..楼主打出来的句子是病句... (old后面不应该+s)seven years old 与seven-year-old 的区别1.seven years old 可做谓语,不可以做冠词 就是不可以用来修饰名词代词...