ˌcheck ˈup on sbto make sure that sb is doing what they should be doing监督;督促My parents are always checking up on me.我父母总是督促我。check up on sb查看某人证件:When a stranger wanted to enter the factory,our porter checked up on him and asked him whom he wanted to see.当一位陌生人想进入我们工厂时,我们的守门人查看他的证件,并且问他想找谁。 |