by the age of是什么意思,by the age of的意思翻译、用法、同义词、例句
常用词典
到……年龄
例句
By the age of 21 he controlled the company.
他21岁就掌管了公司。
In some sports you're past it by the age of 25.
在某些运动中,人过25岁就难有作为了。
She will start with a low one-inch heel and build up to a towering five inches by the age of 23, as she teeters into womanhood.
随着她从女孩变成女人,她将从1英寸的低跟开始,到23岁时逐渐增加到5英寸的高跟。
Children ought to be able to read by the age of 7.
儿童7岁时应该识字了。
By the age of sixteen he was the junior lightweight champion of Poland.
16岁时他已是波兰少年轻量级冠军。
专业解析
"by the age of"是英语中表示时间节点的常用介词短语,字面含义为"到…年龄时"。其核心用法可分为两点:
- 动作完成时限:强调在指定年龄前已完成某个行为(如:She had learned three languages by the age of 10)
- 状态达成标准:表示达到某年龄后具备特定资格或特征(如:By the age of 18, citizens gain voting rights)
该短语包含两个语法要素:
- by作时间介词时含"不迟于"的截止含义
- the age of特指具体年龄数值,常见搭配基数词(如of 5/16/35)
典型应用场景包括:
- 教育领域描述学习成果("掌握乘法运算 by the age of 8")
- 法律条文规定权利义务("法定驾驶年龄 by the age of 17")
- 科研报告中的发展里程碑("60%幼儿形成逻辑思维 by the age of 4")
需注意与相似短语的区别:
- at the age of 强调精确时间点(侧重"在…岁时")
- before the age of 强调时间区间(侧重"…岁前")
网络扩展资料
“by the age of” 是一个英语短语,用于表示“在某个特定年龄之前(已完成某事或达到某种状态)”。以下是详细解析:
核心含义
- 时间截止点:强调动作或状态在所指年龄前已完成,隐含“不晚于该年龄”的意思。
- 例句:Most children can readby the age of 7.(大多数孩子在7岁前已会阅读。)
语法结构
-
基本形式:
by the age of + 数字(年龄)
- She had published her first novelby the age of 20.(她20岁前已出版了第一部小说。)
-
时态搭配:
多与完成时态连用(如过去完成时、现在完成时),强调动作的完成性。
- By the age of 30, hehad become a CEO.(到30岁时,他已成为了CEO。)
对比其他类似表达
- vs. "at the age of":
- at the age of 表示“在某个年龄时”(强调时间点);
- by the age of 强调“在该年龄前已完成”。
- 对比:
- He started his companyat the age of 25.(他在25岁时创办了公司。)
- Hehad started his companyby the age of 25.(他在25岁前已创办了公司。)
常见使用场景
- 成就描述:
By the age of 15, she had mastered three languages.(她15岁前已掌握三门语言。)
- 科学研究:
90% of brain development occursby the age of 5.(90%的大脑发育在5岁前完成。)
- 目标设定:
I want to retireby the age of 40.(我计划40岁前退休。)
易错点提醒
- 时态错误:误用一般过去时代替完成时。
❌ He learned to drive by the age of 18.
✅ Hehad learned to drive by the age of 18.
- 介词混淆:避免与 at、until 等混淆。
❌ She was a doctor at the age of 28.(仅说明28岁时的状态,未体现“完成”)
✅ Shehad become a doctor by the age of 28.
掌握这一短语的关键是理解其“截止时间”的含义,并注意搭配完成时态。
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