我奶奶年过七十,可身体还是很好 用英语怎么说?

My grandma over seventy years, but the body is still very well

seventy years old as my grandmother is ,she is still fit 我这里用了倒装句，高级！

My grandma is over/more than seventy years old , but she is still good heath.
over
more than 都是超过的意思
be in good health=healthy 健康

My grandma over seventy years, but the body is still very well.
、

My grandmother is more than 70 years old,but she still in good health.