They weigh about 3 kg and can keep up with their mother after a few days.

"It'll be something for me to take notice of, if he keeps it up after tomorrow."

He could not keep up the pace after the third set, though.

Indeed, from father to son, they kept up some knowledge of the French tongue, and among themselves often spoke it after a fashion.

They had no interest in keeping it up after a certain point.

And do you keep up with them after your work?

Calves are able to keep up with the herd within just a few hours after birth.

He didn't know how the old man kept it up after all the years.

You'll keep up with us, after a week or so.

My father kept it up for the rest of the run after lunch.