核心结论
due to 在英语中有两个完全不同的用法,需要严格区分:第一种是 be due to do sth.,表示「预定做某事/计划做某事」,此时 due 是形容词,to do 是不定式,整个结构是「系动词 + 表语 + 不定式」;第二种是 due to + 名词,表示「因为/由于」,此时 due to 整体作复合介词使用,后接表示原因的名词或名词性结构。
两个结构的核心区别在于:be due to do 描述的是未来的计划或安排(scheduled/expected to do),强调时间上的预定性;due to + N 表达的是因果关系(because of),解释事件发生的原因。虽然形式上都包含 due to,但语义功能和句法角色截然不同,不可相互替代。
易错点与直译陷阱
最常见错误是看到 due to 就理解为「因为」:读到 The train is due to arrive at 5. 误译为「火车因为五点到达」,实际应译「火车预定五点到达」—— 判断方法是看 due to 后面跟的是动词原形(do)还是名词(N)。
不能把 be due to do 拆开理解为「be due to(归因于)+ do」:be due to do 是固定搭配表预定,不能拆解为「归因于做某事」这种不成立的语义 —— due to 作「因为」讲时后面只能接名词,不接动词原形。
翻译 due to + N 时不要漏译「由于/因为」:The success was due to teamwork. 不能译成「成功是团队合作」,应译「成功是由于团队合作」—— due to 本身携带因果语义,必须在中文里体现出来。
be due to do 不能用 because of 替换:The meeting is due to start. 不能改写为 The meeting is because of to start. —— because of 是介词短语接名词,而 to start 是不定式,词性不匹配。
近似结构辨析
be due to do vs. be going to do:前者强调按计划/日程预定(official schedule),后者表达说话人的打算或基于证据的预测。The conference is due to open tomorrow.(会议预定明天开幕,官方日程)vs. I'm going to attend the conference.(我打算参加会议,个人计划)
due to + N vs. because of + N:两者都表原因,可互换,但 due to 稍正式,多见于书面语;because of 更口语化。The delay was due to technical problems. = The delay was because of technical problems.
due to + N vs. owing to + N:owing to 同样表原因,与 due to 在因果义上完全等价,都是正式书面表达,可自由替换。Owing to bad weather = Due to bad weather.
be due to do vs. be about to do:前者指按既定计划时间表的安排(scheduled),后者指即将发生(imminent,时间非常近)。The flight is due to depart at 10.(航班预定十点起飞)vs. The flight is about to depart.(航班马上就要起飞了)
理解与翻译方法
判断流程:看到 due to 先观察后面紧跟的词 —— 如果是动词原形(do/start/arrive 等),则整体结构是 be due to do,译「预定做」;如果是名词/代词/动名词,则 due to 是介词,译「因为/由于」。
翻译 be due to do 时抓住「时间预定」核心:根据上下文选择「预定」「计划」「预期」「定于」等译法,强调安排的确定性。搭配明确时间状语时(next week/at 3 p.m.)更易识别。
翻译 due to + N 时体现因果关系:在中文里显式译出「因为」「由于」「归因于」,不要只译出原因内容而省略因果连接词 —— 这是与 because of 相同的处理原则。
遇到复杂句时拆分理解:The meeting, which was due to start at 9, was postponed due to a power outage. 先识别 was due to start(预定开始),再识别 due to a power outage(因为停电),两个 due to 在同一句中职能不同。
考法提示
阅读理解中常考对 be due to do 的时间判断:题目问「某事何时发生」,原文说 is due to happen next week,答案是「下周」而非「已发生」—— 考查对「预定」时态的理解。
完形填空可能考 due to 与 because of, owing to 的同义替换:空格前是名词,空格后是原因,备选项里有 due to/because of/owing to,三者都可选,考查因果介词的等价识别。
翻译题易设陷阱:给出 The meeting is due to begin. 要求翻译,考生若译成「会议因为开始」就错了,应译「会议预定开始」—— 考查对固定搭配的准确理解,不被表面相似误导。
长难句分析中可能同时出现两种用法:一个句子里既有 be due to do 又有 due to + N,要求考生分别识别并翻译,考查在复杂结构中区分不同语义的能力。
教学例句
The new policy is due to take effect in January, but its implementation may be delayed due to budget constraints.
新政策预定于一月生效,但其实施可能会因为预算限制而推迟。
同一句中同时出现两种用法:is due to take effect 表预定,due to budget constraints 表原因。
The decline in biodiversity is largely due to habitat destruction and climate change.
生物多样性的下降主要是由于栖息地破坏和气候变化。
due to 作介词,后接名词短语表原因,可替换为 because of 或 owing to。
The committee is due to release its findings next month, and the report is expected to spark considerable debate.
委员会预定下月公布调查结果,预计该报告将引发大量争论。
is due to release 表按计划的时间安排,多用于正式语境。
The experiment failed due to contamination of the samples, so the researchers are due to repeat it under stricter conditions.
实验因为样本污染而失败,因此研究人员预定在更严格的条件下重复实验。
先用 due to 表原因,后用 be due to do 表后续安排,展示两种用法的语境差异。