1.is nineteen more than eighteen?
十九比十八多吗?
2.ten plus nine is nineteen.
十加九是十九。
3.how old are you? i am nineteen.
你多大了?我十九岁了。
4.where was he born and where did he visit when he was nineteen?
他在哪里出生,19岁时去了哪里?
5.i am nineteen years old.
我十九岁。
6.'nineteen years,' the husband says.
“十九年了,”丈夫说。