mid-thirties

mid-thirties — noun

1. the middle part of the period of life between 30 and 40 years old, roughly from

1.名詞A2
釋義

the middle part of the period of life between 30 and 40 years old, roughly from age 34 to 37. Speakers use this range when they do not know or need to give the exact age.

例句

Minh is in his mid-thirties, though his grey hair makes him look older.

in one's mid-thirties — standard prepositional phrase

The clinic offers free health checks for women in their mid-thirties.

文法句型

in one's mid-thirties

reach one's mid-thirties

by one's mid-thirties

用法筆記

Always plural ('mid-thirties'), never singular. Usually preceded by a possessive determiner: 'my mid-thirties', 'his mid-thirties', 'their mid-thirties'. The preposition 'in' is the most common partner, but 'by', 'during', 'before', and 'after' are also used.

常見錯誤

❌She is mid-thirties.
✅She is in her mid-thirties.
💡English requires a preposition and a possessive determiner before 'mid-thirties'.
❌He started his business in his mid-thirty.
✅He started his business in his mid-thirties.
💡'mid-thirties' is always plural.

2. the period in a person's life when they are in their mid-thirties, viewed as a s

2.名詞B1
釋義

the period in a person's life when they are in their mid-thirties, viewed as a stage with typical experiences, challenges, or achievements — such as career changes, starting a family, or reaching a level of professional stability.

例句

Christopher decided to change careers in his mid-thirties and trained as a nurse.

change careers — a common life-stage action associated with this age

Many first-time parents in their mid-thirties look for schools near their new home.

文法句型

in one's mid-thirties

one's mid-thirties + verb

用法筆記

This sense treats the age range as a life chapter rather than a mere number. It often appears alongside verbs describing personal milestones: 'change careers', 'get married', 'have children', 'start a business'. The definite article is occasionally used ('the mid-thirties') when speaking generally about the life stage, though 'one's mid-thirties' remains more common.

常見錯誤

❌She changed her career in mid-thirties.
✅She changed her career in her mid-thirties.
💡The possessive determiner is required.
❌Mid-thirties is a busy time.
✅The mid-thirties are a busy time.
💡'Mid-thirties' is plural, so use 'are'.