She kept track of Ted's movements around the gallery, his interactions.

He had begun to keep track of her movements, to eavesdrop and observe.

He kept track of her movements, looking for the little more that suggested she was coming further out of the coma.

Every network kept track of her movements, she knew.

It was therefore not difficult for the authorities to keep track of their movements.

She could see him treading water, turning this way and that, trying to keep track of her movements.

He kept track of her movements by the sound.

It was very subtle; with that citizen's card to keep track of your movements they didn't need heavy surveillance.

Is he trying to keep track of her movements?

We've been having trouble keeping track of your movements recently.