1.be the same age as sb.和某人一样的年龄.
be the same as 与……一样 at the age 在……的年龄
只是be the same as 后面加某人
2.as old as sb.和某人一样的年纪
as……as 同样有“与……一样”的意思
只是:as +形容词+as+某人
sb looks the same as sb
sb and sb have the same of looks
sb and sb look the same
sb and sb look the same!