as early as

句子示例

1. As early as 2005, the company had already invested in renewable energy.早在2005年，该公司就已经投资了可再生能源。
2. The disease can be detected as early as the first week of infection.这种疾病最早可在感染第一周被检测出来。
3. As early as the 18th century, scientists began to question the geocentric model.早在18世纪，科学家就开始质疑地心说。
4. Please submit your application as early as possible.请尽早提交申请。
5. Tickets sold out as early as the first day of sales.门票早在开售第一天就售罄了。

词义解析

本义指「早在某个时间点」，用于强调某事件发生的时间比预期或提及的时间更早。例如：As early as 1990, scientists warned about climate change.（早在1990年，科学家就警告过气候变化。）引申义用于数量或程度，表示「早在……就达到」，强调起点之低或时间之早，如：Tickets sold out as early as the first day.（票早在第一天就卖光了。）两个义项都围绕「早」这一核心，从具体时间延伸到抽象起点。

字源分析

early 源自古英语 ærlīce，由 ær（早）加 -līce（类似地）构成，与德语 eher 同源。as ... as 是比较结构，表示「与……一样」。整体结构 as early as 字面意为「和……一样早」，后接时间点或数量，强调不晚于该点。记忆时可拆分为 as + early + as，联想「和某个时间点一样早」，即「早在」。

使用场景

该词组常见于正式书面语，如学术论文、新闻报道、历史叙述，用于强调时间之早以增强说服力。在商务邮件中可用来强调行动迅速。日常口语中较少单独使用，但可用于强调惊讶，如：He arrived as early as 6 a.m.。法律文本中用于规定最早时间。文学作品中可营造时间紧迫感。总体语气中立偏正式。

语法说明

as early as 后接名词短语或从句，表示时间或数量。常见句型：as early as + 时间点（如 1990, January, the 19th century）。易错点：不可直接接动词原形，需用从句或动名词。例如：As early as seeing the problem, he acted.（误）应改为 As early as he saw the problem, he acted. 另外，as early as 通常不与完成时连用表示持续，而强调起点。

词义辨析

与 as soon as 区别：as soon as 表示「一……就」，强调两个动作紧接；as early as 强调时间点早。与 no later than 区别：no later than 表示「不晚于」，是截止时间；as early as 强调实际发生时间之早。与 already 区别：already 表示「已经」，不强调早。选用时，若强调时间早于预期，用 as early as；若强调紧接，用 as soon as。

注意事项

语域中性偏正式，褒贬色彩中性。常见误用：误将 as early as 用于表示「尽快」，如 Please reply as early as possible.（应改为 as soon as possible）。此外，as early as 后接时间时，通常不用将来时，如 as early as tomorrow 可接受，但 as early as next week 更常见。避免与 as soon as 混淆。

常用组合

• as early as possible尽早
• as early as next week最早下周
• as early as 1990早在1990年
• as early as the beginning早在开始时
• as early as childhood早在童年
• as early as the first century早在公元一世纪