Mastering English Time Expressions: Prepositions and Articles (B2) — B2 English vocabulary lesson by Langcom

Mastering English Time Expressions: Prepositions and Articles (B2)

Raúl Maguiña

Fundador da Langcom | Examinador dos exames de Cambridge e SIELE

setembro 20, 2026

B2📚 Vocabulário⏱️ 5 min de leitura📅 Atualizado em setembro de 2026
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Using the correct prepositions (in, on, at, for, during) and knowing when to use or omit articles (the) are key to mastering English time expressions. For specific times, use at (e.g., at 3 pm). For days and dates, use on (e.g., on Tuesday, on June 24th). Use in for longer periods like months, years, seasons, and parts of the day (e.g., in July, in the morning). Remember that expressions like last week, next month, yesterday, e tomorrow do not need prepositions or articles. Understanding these rules will significantly improve your fluency and accuracy in English.

Why Are English Time Expressions Tricky?

Many English learners find time expressions difficult. This is often because English uses prepositions and articles differently from other languages, like Spanish.

Sometimes you need a preposition, sometimes you don’t. Sometimes you need an article, sometimes you don’t. Let’s look at the most common rules.

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When to Use 'In', 'On', and 'At' for Time?

These three prepositions are very common for talking about time. Their use depends on how specific the time is.

  • At: For specific points in time.
    • Exact times: at 7 o'clock, at midnight, at 3 am.
    • Holidays without 'Day': at Christmas, at Easter.
    • Fixed expressions: at night, at the weekend (US English).
  • On: For specific days and dates.
    • Days of the week: on Monday, on Tuesday morning.
    • Specific dates: on June 24th, on my birthday.
    • Holidays with 'Day': on Christmas Day, on New Year's Eve.
    • Fixed expressions: on the weekend (UK English).
  • In: For longer periods of time.
    • Months: in July, in December.
    • Years: in 2023, in the 1990s.
    • Seasons: in summer, in winter.
    • Parts of the day: in the morning, in the afternoon, in the evening. (But remember: at night).

Time Expressions Without Prepositions or Articles

Some common time expressions do not need a preposition or an article. Using them can sound unnatural or incorrect.

  • Palavras como last, next, this, every:
    • last week, next month, this year, every day.
    • You do NOT say on last week ou in the next month.
  • Palavras como yesterday, tomorrow, today:
    • I saw him yesterday.
    • You do NOT say on yesterday ou at tomorrow.

'For' vs. 'During': What's the Difference?

For e during both talk about periods of time, but they have different uses.

  • For: To say how long something lasts. It indicates the duration.
    • I studied for two hours. (Duration: two hours)
    • She lived in London for five years. (Duration: five years)
  • During: To say when something happens within a period. It indicates a specific time within a larger period.
    • I fell asleep during the movie. (When: at some point in the movie)
    • During the summer, we often go to the beach. (When: at some point in the summer)
Summary of Common Prepositions of Time
Preposition Usage Exemplos
At Specific times, holidays (no 'Day'), night at 5 pm, at Christmas, at night
On Specific days, dates, holidays (with 'Day') on Monday, on July 1st, on Christmas Day
In Months, years, seasons, parts of the day in August, in 2024, in summer, in the morning
For Duration (how long something lasts) for two hours, for many years
During When something happens within a period during the meeting, during my holiday

Exemplos

  • My flight leaves at 6:30 pm.
  • We are meeting on Friday.
  • The festival takes place in August.
  • I will call you in the morning.
  • She visited her family last weekend.
  • They have been working on this project for three months.
  • He called me during his lunch break.
  • We're going to the cinema next Tuesday.

Prática

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Erros comuns entre falantes de espanhol

Spanish speakers often make specific mistakes with English time expressions. Here are some to watch out for:

  • Using 'the' with last/next:
    ❌ I saw him the last week.
    ✅ I saw him last week.
  • Usando at with parts of the day:
    ❌ At the afternoon we went for a walk.
    ✅ In the afternoon we went for a walk. (Lembre-se at night is an exception!)
  • Confuso for e during:
    ❌ I played tennis during seven years.
    ✅ I played tennis for seven years.
  • Incorrect prepositions for days/dates:
    ❌ I am coming at 24th June.
    ✅ I am coming on 24th June.
  • Incorrect prepositions for weekend:
    ❌ In the weekend we relax.
    ✅ On the weekend we relax. (UK English)
    ✅ At the weekend we relax. (US English)

Perguntas frequentes

What is the difference between 'in the morning' and 'at morning'?

You should always use in the morning, in the afternoon, e in the evening. The only exception is at night. At morning is incorrect.

Do I use 'on' or 'at' for 'the weekend'?

Both are correct, but they depend on the region. In British English, people usually say on the weekend. In American English, at the weekend is more common. For the B2 First exam, both are generally accepted, but be consistent.

Why do some time expressions not need a preposition?

Palavras como last, next, this, every, yesterday, tomorrow, today act as adverbs or part of adverbial phrases. They inherently tell you 'when' without needing an extra preposition to connect them to the verb. For example, last week already means 'during the previous week'.

How can I practice these expressions for the B2 First exam?

Pay close attention to time expressions in reading texts and listening exercises. When you write, especially in tasks like essays or emails, try to use a variety of these expressions correctly. Review your work specifically for preposition and article errors related to time.

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Sobre o autor: Raúl Maguiña

Raúl Maguiña é diretor da Asociación Educativa Langcom, um centro autorizado de preparação para o Cambridge English em seu país. Com mais de uma década de experiência no ensino de idiomas e em certificações internacionais, ele já ajudou milhares de alunos, professores e instituições de ensino em 25 países a obter as certificações de inglês da Cambridge, IELTS, TOEFL e Michigan.

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