chauffeur

1. N-COUNT The chauffeur of a rich or important person is the man or woman who is employed to take care of their car and drive them around in it. (富人、要人的) 私人司机

2. V-T If you chauffeur someone somewhere, you drive them there in a car, usually as part of your job. 为…开车 (通常指受雇佣)

It was certainly useful to have her there to chauffeur him around. 有她在那儿为他开车肯定是有用的。