ایده‌ای که بماند

از کوچک به بزرگ فکر کنید: at برای ساعت‌های دقیق، on برای روزها و تاریخ‌ها، in برای دوره‌های طولانی مثل ماه‌ها و سال‌ها.

تصویر آبرنگ دفتر باز، کتاب‌ها و چای کنار پنجره آفتابی
کمی زمینه معنا را روشن می‌کند.

01at: points on the clock

Use at for precise points: clock times, mealtimes treated as points, and festival moments. At 7 o'clock, at noon, at midnight, at night, at Christmas — each one answers the question exactly when. Think of at as a pin dropped on the timeline.

The meeting starts at 10 a.m.

at + clock time

The meeting starts at 10 a.m.

Clock times always take at: at 9:30, at noon, at midnight.

02on: days and dates

Use on for days of the week and calendar dates: on Monday, on May 1st, on Christmas Day. When a date includes the day, on wins — on Monday morning, on the weekend (American) — because the day is the anchor. If you can circle it on a calendar page, reach for on.

Her birthday is on May 1st.

on + date

Her birthday is on May 1st.

Dates with month + day take on.

03in: longer stretches

Use in for months, seasons, years, and parts of the day: in July, in summer, in 2026, in the morning. These are containers of time rather than points — you are somewhere inside the period. Centuries and decades follow the same logic: in the 1990s.

Watch the famous pair: arrive on time means punctual, while arrive in time means early enough to do something — in time for dinner, in time to help. And drop the preposition entirely before this, last, next, every, yesterday, and tomorrow: see you next Monday, not on next Monday.

She was born in 2019.

in + year

She was born in 2019.

Years, months, and seasons take in.

04Try a week of your life

Write seven lines about your week using all three: at 7:30, on Tuesday, in the evening. Then add one deadline with by — finish this by Friday — and notice how by means no later than, not at that moment. Keeping your own examples next to each other makes the small-to-big picture stick.

نوبت شما

پیوند را بسازید.

پیش از انتخاب، موقعیت را بخوانید. دلیل به‌اندازه پاسخ مهم است.

Give the exact departure time.
آزمون سریع 1

The train leaves ? 6:45.

Give the exact departure time.

حرف اضافه انتخاب کنید. دلیل را کشف کنید.

پاسخ و شرح

at · Clock times take at.

The meeting happened inside that morning.
آزمون سریع 2

We met ? a cold morning in December.

The meeting happened inside that morning.

حرف اضافه انتخاب کنید. دلیل را کشف کنید.

پاسخ و شرح

on · A morning with a modifier (a cold morning) takes on; plain in the morning takes in.

برای مطالعه بیشتر

این مثال‌ها را با کمک هوش مصنوعی می‌سازیم. کاربرد به زمینه بستگی دارد و الگوهای مقدماتی همه را پوشش نمی‌دهد. منابع زیر را ببینید.

روش تحریریه ما · اصلاح پیشنهاد دهید

تکرار کم. پیوند قوی‌تر.

در اپ تمرین جفتی و مرور خطا را ادامه دهید.

PrepoQuest را ببینید