幾歲到幾歲的英文基本上不難，可以稍微知道一下。三十幾歲，四十幾歲的用法也可以記一下，蠻常聽到的。I am in my twenties. 我二十幾歲。He is in his thirties. 他三十幾歲。She’s in her forties. 她四十幾歲。
年紀的單字
0-1 a baby 嬰兒， a newborn baby 新生兒，a six-week-old baby 六週大的嬰兒
1-2 a toddler 幼童，剛會走路，學走路的
2-12 a child 兒童
13-19 a teenager 青少年，early teens 十三歲十四歲
18 + an adult 成年人(不同國家定義不同)
20-29 in your twenties 二十幾歲，mid-twenties 指的是二十四歲到二十六歲
30-39 in your thirties 三十幾歲，late thirties 指的是三十八到三十九歲
45+ middle-aged 中年，a middle-aged woman 一個中年婦人
65 a senior/a senior citizen 老年人
75+ old age 老年，elderly 老年人
13-17 adolescence 青春期 He had a troubled adolescence. 他經歷了坎坷的青春期。
A person who is grown up is an adult. 長大了後的是成人。
The time when you stop work is retirement, often starting at 65. 你停止工作後的時間是退休，通常六十五歲開始。
Lisa was born in Taichung, but when she was 3, her father got a new job in Taipei, and she grew up in Taipei. 麗莎在台中出生，但是當她三歲的時候，她的父親在台北得到一個工作，她在台北長大。
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She went to college at 18, where she met John. 她十八歲念大學，在哪裡她遇到了約翰。
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She went out with him for three years, but toward the end they had lots of fights, and they broke up/split up. 她跟他交往了三年，但是在最後的時候他們常常吵架，他們分手了。
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In her late thirties she met Sam. 在她快四十歲的時候她遇到了山姆。
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They fell in love and got married within three months. 他們墜入愛河，在三個月內就結婚了。
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A year later she got pregnant and they had their first child. 一年之後她懷孕了，他們有了第一個孩子。
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Sadly, the marriage was not a success. 傷心地，那婚姻不成功。
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Sam left two years afterward and they got divorced. 山姆兩年後離開，他們離婚了。
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Three years later, Lisa remarried, and now she is expecting a second baby. 三年後，麗莎再婚，現在她懷了第二個孩子。
