一、核心区别
Look Through：强调“主动浏览、仔细查看”的动作，侧重过程，不涉及对事物本质的判断。
See Through：强调“看穿、识破”本质，或“支持某人度过困难”，侧重结果或深层理解。
二、详细用法及例句解析
1. Look Through
含义1：快速浏览（文件、列表等）
常见搭配：look through + 名词（document, list, report）
例句：She looked through the meeting agenda (that her assistant had prepared) before the conference started.
句式结构：主语 + look through + 宾语（+ 定语从句）
时态：一般过去时（描述过去具体动作）
从句：that引导定语从句，修饰agenda，说明文件来源
含义2：仔细查看（物品、细节）
例句：The detective is looking through the evidence (which was collected from the crime scene) to find clues.
句式结构：主语 + be动词 + looking through + 宾语（+ 定语从句）
时态：现在进行时（强调当前正在进行的动作）
从句：which引导定语从句，修饰evidence，说明证据的来源
2. See Through
含义1：看穿、识破（谎言、伪装）
常见搭配：see through + 名词（lie, disguise, trick）
例句：I saw through his flattery (that he used to get a promotion) immediately.
句式结构：主语 + see through + 宾语（+ 定语从句）
时态：一般过去时（描述过去瞬间的判断）
从句：that引导定语从句，修饰flattery，说明奉承的目的
含义2：支持某人度过（困难时期）
例句：Her friends have seen her through the tough time (when she lost her job last year).
句式结构：主语 + have seen + 宾语 + through + 名词（+ 定语从句）
时态：现在完成时（强调动作对现在的影响，“支持”的动作已完成，且她已度过困难）
从句：when引导定语从句，修饰time，说明困难发生的时间
三、练习题
1. 用look through或see through填空，并分析句子成分：
She ________ the contract carefully before signing it.（答案：looked through；时态：一般过去时，宾语：the contract，动作“浏览合同”侧重过程）
We all ________ his excuse because it was full of contradictions.（答案：saw through；时态：一般过去时，宾语：his excuse，动作“识破借口”侧重结果，从句隐含“that was full of contradictions”修饰excuse）
My parents ________ me ________ the difficult period when I failed the exam.（答案：have seen; through；时态：现在完成时，宾语：me，“支持我度过困难时期”，when引导定语从句修饰period）
2. 翻译句子（需体现动词区别）：
他花了一小时浏览所有申请材料。（答案：He spent an hour looking through all the application materials. 用look through体现“浏览”过程）
最终，她看穿了他假装友善的目的。（答案：Finally, she saw through his purpose of pretending to be kind. 用see through体现“看穿”本质）
