英 /ˈfɪɡə aʊt ðæt/美 /ˈfɪɡjər aʊt ðæt/
动词短语（短语动词 + 连词）
弄清楚；计算出；意识到
figure out that 的核心含义是经过思考、推理或计算后得出某个结论或理解某个事实。本义与“计算”相关：figure 作动词有“计算、演算”之义，因此 figure out 最初指通过算术或逻辑推演得出数值或结果，后接 that 从句时表示“算出……”。由此引申出“弄清楚、弄明白”之义，强调通过分析、调查或思考消除疑惑，例如弄清原因、机制或真相。进一步引申为“意识到、发觉”，语气上更接近突然明白或逐渐认清某个事实，常带有“原来如此”的意味。三个义项构成从具体计算到抽象理解、再到认知觉察的连续引申链条，核心都离不开“通过心智活动得出结果”。
figure 源自拉丁语 fingere（塑造、形成），经古法语 figure 进入英语，本义与“形状、图形”相关，后发展出“数字符号”及“计算”的动词用法。out 为副词小品词，表示“出来、彻底”。二者组合成短语动词 figure out，字面即“把结果算出来、把形状弄出来”，引申为“把问题弄明白”。记忆时可联想：面对一团模糊的图形（figure），通过思考把它理清（out），最终得出一个结论（that 从句）。
该短语在口语和书面语中均常见，但语域偏中性。日常口语中常用于表示“弄明白、想通”，如 I figured out that he was lying。商务邮件和会议中常用于报告调查或分析结论，语气较随意但清晰。学术写作中较少使用，因 figure out 偏口语化，正式论文多用 determine、establish、conclude 等。新闻报道中可用于引述当事人或调查者的发现，语气较生动。法律文本中几乎不用，因不够正式。文学作品中可用来描写人物心理活动，表现认知转变的过程。
figure out 是及物短语动词，后接 that 引导的宾语从句，that 在口语中常可省略。也可接名词、代词或 wh- 从句，如 figure out the answer、figure out what to do。注意 figure out 的宾语为 that 从句时，that 不可换成 what 或 which。易错点：不要与 figure on（指望、计划）混淆；另外，figure out 不用于被动语态后接 that 从句的常见结构，如不说 It was figured out that...（虽语法可行但极少用）。
与 find out 相比，figure out 强调通过思考、推理或计算得出结论，而 find out 强调通过调查、询问或发现获得信息，如 find out the truth 侧重查明真相，figure out the truth 侧重通过分析弄明白真相。与 work out 相比，work out 更英式，且常指通过计算或逐步思考解决难题，与 figure out 接近，但 figure out 更口语化。与 realize 相比，realize 强调突然意识到，而 figure out that 强调经过思考过程后得出结论，如 I figured out that he was lying 暗示经过观察推理，I realized that he was lying 则更强调瞬间醒悟。与 determine 相比，determine 更正式，常用于科学或法律语境。
figure out that 语域偏中性至口语化，不适合非常正式的学术论文或法律文书，正式场合可替换为 determine that、establish that、conclude that 等。该短语无褒贬色彩，但用于人时可能隐含“看穿、识破”之意，需根据语境判断。常见误用：一是将 figure out 与 figure on 混淆，figure on 意为“指望、计划”，如 I figure on going 意为“我打算去”，而非“我弄明白去”；二是 that 从句中误用疑问语序，如不说 figure out that what is he doing。
| figure out that the problem is | 弄清楚问题在于 |
| figure out that the answer is | 算出答案是 |
| figure out that someone is lying | 发觉某人在撒谎 |
| figure out that something is wrong | 发现某事不对劲 |
| figure out that the cause is | 查明原因是 |
| figure out that the total is | 算出总数是 |
| figure out that the truth is | 弄明白真相是 |
| figure out that the plan will work | 判断计划会奏效 |
| I finally figured out that the problem was caused by a loose wire. | 我终于弄清楚了，问题是由一根松动的电线引起的。 |
| She figured out that the total cost would be higher than expected. | 她算出总成本会比预期的高。 |
| He figured out that his colleagues had been hiding the truth from him. | 他意识到同事们一直在对他隐瞒真相。 |
| After hours of analysis, the team figured out that the bug was in the login module. | 经过数小时分析，团队弄明白了缺陷出在登录模块。 |
| It took me a while to figure out that she was joking. | 我过了一会才明白她是在开玩笑。 |
| The detective figured out that the suspect had an alibi. | 侦探查明嫌疑人有一个不在场证明。 |