Our ancestors used to have to fight to protect their breeding pond.

Our ancestors have been using such paper for about 400 years.

My savage ancestors used to die when they reached a certain age.

To most of us Earth is just the place where our ancestors used to live long ago.

Could he and his ancestors have been using this as a hiding place for wealth?

In days past, your ancestors used it to kill the most powerful men of their time.

His ancestors hadn't used common sense, any of 'eml 'Who was he to start such a practice?

Their ancestors used to worship the sea, which many of them they still do.

I should like to point out that our ancestors used readily to move around.

"I'm more interested in how my ancestors used to live," he said.