I asked my mother how old I was then .Mother said that I was three years old in that time .

问题描述:

I asked my mother how old I was then .Mother said that I was three years old in that time .

我问妈妈那时我几岁,妈妈说那时我三岁了

我问妈妈当时我多大了
妈妈说我当时3岁了

你要做什么?翻译的话是这样的:
我问我妈妈当时我多大? 我妈妈说当时我三岁.
并且 应该是 at that time.

我问妈妈当时我多大了
她说当时我3岁了

in--at

in that time -> at that time

那时侯我问我妈妈我几岁了。母亲告诉我才3岁 at that time