这句话对吗 ；a 7 years old boy

这句话对吗 ；a 7 years old boy the old couple marry fifty years ago.这句话对吗 这句对吗 15 years old boy .when i was ten.when i was ten years old 这两句话都对吗 I first study English about three years old.这句话对吗？ I learn to dance at 8 years old 这句话对吗 Sue is 15 years old.So she is elder than the sister who are 14 years old.这句话有语法错误吗?定语从句对吗? she is a 12 years old girl.这种说法对吗? I am an active 12-years-old girl这句话对吗?如果不对,不对在哪 快 How old is sally这句话对吗 a fourteen years old boy 在句子中对吗是a fourteen -year- old boy the sport of basketball is a little over a hundred years old.这句话什么意思? 1、The children are under seven years of age.这句话对吗?2、The children are under the age of seven.这句话对吗?3、The children are under seven years old.这句话对吗?4、The children are under seven-year-old.这句话对吗?应该哪 his brother who is a pla man is eighteen years old.这句话是什么意思呀? the bird's nest is only a little years old这句话有错么 I am a sixteen-years-old student.这句话那里有错误? 帮忙看看这句英语对吗?He was 11years old and went .He was 11years old and went fishing every chance he got from the dock at his family's cabin on an island in the middle of a New Hampshire lake.这句话有不对的吗? 帮忙看看这句英语对吗?He was 11years old and went .He was 11years old and went fishing every chance he got from the dock at his family's cabin on an island in the middle of a New Hampshire lake.这句话有不对的吗?顺便帮忙翻译一