look over; （医生）检查（身体）
look up; 查字典
look for; 寻找
find;找到；发现
find out 找出；查明（事实、真相等）能再详细点，加上例句好吗？The doctor looked over the boy carefully.If you don't know a word, please look it up in the dictionary.I can't find my watch, and I 'm looking for it.Please find out who broke the window.