look for是寻找的意思，着重点不一样的。

care for关心，照顾，喜欢：着重于care关心He choose the woman to cook and care for him at regular intervals. 他每隔一定时间会选择一个女人来为他做饭并照顾他。look after 照顾；关心；目送：着重于look看着It's her duty to look after her aunt. 照顾她姨妈是她分内的事。