活到多少岁用英语怎么表达

Assuming he's still alive, how old would he be now?

假定他还活着，现在有多大年纪了？

How old is she ─ seventy odd?

她多大年纪？七十出头？

How old is your son now?

你儿子现在多大了？

How old are you?

您多大岁数了？

How old is she?

她多大年纪了？