by the age of是什麼意思,by the age of的意思翻譯、用法、同義詞、例句
常用詞典
到……年齡
例句
By the age of 21 he controlled the company.
他21歲就掌管了公司。
In some sports you're past it by the age of 25.
在某些運動中,人過25歲就難有作為了。
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.
隨着她從女孩變成女人,她将從1英寸的低跟開始,到23歲時逐漸增加到5英寸的高跟。
Children ought to be able to read by the age of 7.
兒童7歲時應該識字了。
By the age of sixteen he was the junior lightweight champion of Poland.
16歲時他已是波蘭少年輕量級冠軍。
專業解析
"by the age of"是英語中表示時間節點的常用介詞短語,字面含義為"到…年齡時"。其核心用法可分為兩點:
- 動作完成時限:強調在指定年齡前已完成某個行為(如:She had learned three languages by the age of 10)
- 狀态達成标準:表示達到某年齡後具備特定資格或特征(如:By the age of 18, citizens gain voting rights)
該短語包含兩個語法要素:
- by作時間介詞時含"不遲于"的截止含義
- the age of特指具體年齡數值,常見搭配基數詞(如of 5/16/35)
典型應用場景包括:
- 教育領域描述學習成果("掌握乘法運算 by the age of 8")
- 法律條文規定權利義務("法定駕駛年齡 by the age of 17")
- 科研報告中的發展裡程碑("60%幼兒形成邏輯思維 by the age of 4")
需注意與相似短語的區别:
- at the age of 強調精确時間點(側重"在…歲時")
- before the age of 強調時間區間(側重"…歲前")
網絡擴展資料
“by the age of” 是一個英語短語,用于表示“在某個特定年齡之前(已完成某事或達到某種狀态)”。以下是詳細解析:
核心含義
- 時間截止點:強調動作或狀态在所指年齡前已完成,隱含“不晚于該年齡”的意思。
- 例句:Most children can readby the age of 7.(大多數孩子在7歲前已會閱讀。)
語法結構
-
基本形式:
by the age of + 數字(年齡)
- She had published her first novelby the age of 20.(她20歲前已出版了第一部小說。)
-
時态搭配:
多與完成時态連用(如過去完成時、現在完成時),強調動作的完成性。
- By the age of 30, hehad become a CEO.(到30歲時,他已成為了CEO。)
對比其他類似表達
- vs. "at the age of":
- at the age of 表示“在某個年齡時”(強調時間點);
- by the age of 強調“在該年齡前已完成”。
- 對比:
- He started his companyat the age of 25.(他在25歲時創辦了公司。)
- Hehad started his companyby the age of 25.(他在25歲前已創辦了公司。)
常見使用場景
- 成就描述:
By the age of 15, she had mastered three languages.(她15歲前已掌握三門語言。)
- 科學研究:
90% of brain development occursby the age of 5.(90%的大腦發育在5歲前完成。)
- 目标設定:
I want to retireby the age of 40.(我計劃40歲前退休。)
易錯點提醒
- 時态錯誤:誤用一般過去時代替完成時。
❌ He learned to drive by the age of 18.
✅ Hehad learned to drive by the age of 18.
- 介詞混淆:避免與 at、until 等混淆。
❌ She was a doctor at the age of 28.(僅說明28歲時的狀态,未體現“完成”)
✅ Shehad become a doctor by the age of 28.
掌握這一短語的關鍵是理解其“截止時間”的含義,并注意搭配完成時态。
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