Mary is 12 years old. two years ago, she was twice as old as her brother jac

Mary is 12 years old. two years ago, she was twice as old as her brother jac

Mary is 12 years old. two years ago, she was twice as old as her
玛丽亚 12 岁(了)。 两 年 以前, 她 是 两倍 岁数 她的

brother jac.
哥哥(弟弟)。

is是“是”的意思,在中文意思(翻译)上可以省略,但在英文上就不能省去,否则变了没动词语句就不成立了。

玛丽亚12岁(了)。两年以前,她岁数是和哥哥(弟弟)的两倍一样。

玛丽今年12岁，两年之前，她是她弟弟岁数一样的两倍。

M今年十二岁了。两年前，她的岁数是弟弟的两倍

M今年十二岁，两年前，她的岁数是弟弟的两倍

应该是：5岁

Jack is seven years old now. Mary will be nineteen years old when Jack is twice his prensent age.