ook after表照顾,如山伏：He looked after his sisterlook up 一般指在字典里查找单词什么的,
look up the word in the dictionary.
look for 指闷唯改寻找,更倾向于找的过程,动作,（顺便提一下）
find也是寻找,但更倾向于蚂判结果.
I looked (look的过去式）for my shoes ,but I couldn't find them .
look over 多指检查,考试检查之类的
Please look over your exam paper carefully.
意思不局圆同
look up 向上胡扰看桐做塌
look out 小心
look after 照顾
look over 检查
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