Prepositions of Time: In the Morning, At Night, On Tuesday Morning – Complete Guide
Time expressions are used every day. You say “Let’s meet in the morning” easily, but should you say “in the night” or “at night”? “This night” or “tonight”? “Yesterday night” or “last night”?
In this lesson, you will master prepositions of time and the common exceptions that even advanced learners confuse. Once you learn these patterns, you will use them instinctively.
SECTION 1: IN THE Morning / Afternoon / Evening vs AT Night
Rule: We say IN for the three daytime periods, but AT for night. No logical reason – it’s an idiomatic exception you must memorize.
Word Meaning:
- Morning = early part of day until noon
- Afternoon = from noon until evening
- Evening = late afternoon to night
- Night = dark part of day
| Correct Expression | Incorrect (Common Mistake) | Explanation & Example | Phrasal Verb Meaning |
|---|---|---|---|
| Let’s meet in the morning. | General morning time. Example: I work in the morning. | Meet up: gather together | |
| Let’s meet in the afternoon. | General afternoon. Example: Call me in the afternoon. | ||
| Let’s meet in the evening. | General evening. Example: Dinner in the evening. | ||
| Let’s meet at night. | in the night (WRONG) | Exception! Night uses AT, not IN. Example: The snow looks beautiful at night. | |
| I usually read in the morning. | Habit in morning. | ||
| He works in the afternoon. | Work schedule. | ||
| We watch TV in the evening. | Evening routine. | Watch TV: view television | |
| The street is quiet at night. | in the night (wrong for general) | General nighttime description. | |
| Owls hunt at night. | Animals active at night. | Hunt for: search for | |
| I can’t sleep at night. | Nighttime problem. | Sleep at night: nighttime sleep |
Special Note: “In the night” IS possible but means “during the middle of a specific night” – e.g., “I woke up in the night” (at 2am). For general “night time”, always use AT NIGHT.
SECTION 2: THIS Morning / Afternoon / Evening vs TONIGHT
Rule: We say this morning, this afternoon, this evening (today’s periods), but we do NOT say “this night”. We say TONIGHT – the night of today.
| Correct | Incorrect | Explanation |
|---|---|---|
| I was tired this morning. | Today morning, past. | |
| I was tired this afternoon. | Today afternoon. | |
| I was tired this evening. | Today evening. | |
| I was tired tonight. | this night (WRONG) | Tonight = this night (today’s night). Exception! |
| I’ll send email this afternoon. | Future today afternoon. | |
| Let’s meet tonight. | Let’s meet this night (wrong) | Tonight = coming night. |
| She had a meeting this morning. | Today morning meeting. | |
| Are you free tonight? | Are you free this night? (wrong) | Common invitation. |
Word Meaning: Tonight = the night of today, the coming night.
Phrasal Verb: Meet up tonight: gather tonight.
SECTION 3: YESTERDAY Morning / Afternoon / Evening vs LAST Night
Rule: We say yesterday morning, yesterday afternoon, yesterday evening but LAST NIGHT – not yesterday night. Again, night is exception.
| Correct | Incorrect | Explanation & Phrasal Verb |
|---|---|---|
| He called yesterday morning. | Yesterday’s morning. | |
| He called yesterday afternoon. | Yesterday’s afternoon. | |
| He called yesterday evening. | Yesterday’s evening. | |
| He called last night. | yesterday night (WRONG) | Last night = yesterday’s night. Exception! |
| It was cold yesterday morning. | Weather description. | |
| The parcel arrived last night. | The parcel arrived yesterday night (wrong) | Arrive = reach destination |
| I stayed home last night. | Stayed home = remained at home (phrasal: stay home) | |
| We went out yesterday evening. | Go out: leave home for entertainment | |
| She studied yesterday afternoon. | ||
| He worked late last night. | Work late: work until late |
SECTION 4: TOMORROW Morning / Afternoon / Evening / Night – NO Exception!
Rule: Good news! For tomorrow, all four are regular – no exception for night. This is the only case where night follows the same pattern.
| Expression | Correct? | Explanation |
|---|---|---|
| See you tomorrow morning. | Correct | Tomorrow’s morning. |
| See you tomorrow afternoon. | Correct | Tomorrow’s afternoon. |
| See you tomorrow evening. | Correct | Tomorrow’s evening. |
| See you tomorrow night. | Correct – Exception to the exception! | Tomorrow’s night – allowed! |
| The concert is tomorrow night. | Correct | Event tomorrow night. |
| I’ll call tomorrow morning. | Correct | |
| Meeting tomorrow afternoon. | Correct | |
| Dinner tomorrow evening. | Correct |
Phrasal Verb: See you: farewell until we meet again.
SECTION 5: ON + Day + Morning / Afternoon / Evening / Night
Rule: When you mention a specific day or date (Tuesday, Monday, January 5th), you must use ON, not IN or AT. The day is more important than the period.
Structure: ON + Day + Morning/Afternoon/Evening/Night
| Incorrect | Correct | Explanation |
|---|---|---|
| in Tuesday morning | on Tuesday morning | Day + morning needs ON. |
| at Tuesday afternoon | on Tuesday afternoon | Day needs ON. |
| in Monday morning | on Monday morning | Same rule. |
| in Sunday | on Sunday | Day alone also needs ON. |
| My exam is in Monday morning. | My exam is on Monday morning. | Correct preposition. |
| Are we meeting in Sunday? | Are we meeting on Sunday? | |
| We met on Friday night. | Friday night with ON. | |
| Party on Saturday evening. | ||
| Call on Thursday morning. | ||
| Flight on Tuesday afternoon. |
Word Meaning: On Tuesday = specific day.
Phrasal Verb: Meet on: schedule for that day.
SECTION 6: GOOD Morning / Afternoon / Evening vs GOOD Night
Critical Difference in Usage:
Good Morning / Good Afternoon / Good Evening = HELLO (Greeting when you arrive)
Good Night = BYE / Goodbye when leaving or going to sleep
| Expression | Meaning & Usage | Example | Correct/Incorrect |
|---|---|---|---|
| Good morning. | Hello in the morning (until noon). Used when arriving/meeting. | Good morning! How are you? Arriving at work. | Correct as greeting |
| Good afternoon. | Hello in afternoon (noon to ∼6pm). Formal greeting. | Good afternoon, May I speak to Mr. Johnson? | Correct as greeting |
| Good evening. | Hello in evening (∼6pm onwards). Formal greeting when arriving. | Good evening, sir. Can I get you a table? (Restaurant manager) | Correct as greeting |
| Good night. | NOT a greeting! Means Goodbye at night or before sleep. | Good night. How are you? = WRONG. Can’t use to say Hello at night. | Incorrect as greeting |
| Good night as goodbye | Leaving at night or going to sleep. | Okay, thank you. Good night! (Leaving friend’s house) | Correct as farewell |
| Good night before sleep | To child/partner before sleep. | Good night, sweetheart. Sweet dreams. | Correct as farewell |
| Good morning as goodbye? | Rare, but morning can also be used leaving? No, Good night only for final leaving. | ||
| Good night at bar entrance | Someone enters bar at night, bartender says Good night? Wrong! Should say Good evening. | Good evening! Welcome! |
Phrasal Verb: Good night = wish for good sleep, not phrasal verb but idiomatic farewell.
Grammatical Explanation: Structure, Tense, Negative, WH-Questions
Base Structure: Preposition + Time Expression
1. Tense Variations:
- Present Simple: I work in the morning. / I work at night.
- Past Simple: I worked yesterday morning. / I worked last night.
- Present Perfect: I have worked this morning. (Today morning, already)
- Future Simple: I will work tomorrow morning. / I will work tomorrow night.
- Present Continuous: I am working this morning (today).
2. Negative Structure:
- I don’t work in the morning.
- I didn’t work yesterday morning.
- I wasn’t tired this morning.
- The parcel didn’t arrive last night.
3. WH-Question Structure:
- When: When will you send email? – This afternoon.
- What time: What time in the morning? – At 9am in the morning? Actually: At 9am on Tuesday morning.
- How: How was yesterday evening? – It was good.
- Are: Are you free tonight? – Yes, I am free tonight.
Structure Reminder:
- IN + the + morning/afternoon/evening
- AT + night
- THIS + morning/afternoon/evening BUT TONIGHT
- YESTERDAY + morning/afternoon/evening BUT LAST NIGHT
- TOMORROW + morning/afternoon/evening/night (all regular)
- ON + Day + morning/afternoon/evening/night
- ON + Day (on Sunday, on Monday)
Exercise Part
Exercise A: Choose Correct Preposition – In / At / On
- Let’s meet ___ the morning.
- The snow looks beautiful ___ the night.
- Let’s meet ___ night. (general)
- See you ___ Tuesday morning.
- My exam is ___ Monday morning.
- The concert is ___ tomorrow night.
Answers: 1-in, 2-at, 3-at, 4-on, 5-on, 6-omitted / no preposition or “on” acceptable: The concert is tomorrow night (no preposition needed with tomorrow)
Exercise B: Choose Correct Expression – This Night vs Tonight / Yesterday Night vs Last Night
- I was tired ___ (this night / tonight).
- He called ___ (yesterday night / last night).
- I was tired ___ morning (this / last).
- She called ___ afternoon (this / yesterday / last – choose).
Answers: 1-tonight, 2-last night, 3-this morning (today) or yesterday morning, 4-this afternoon or yesterday afternoon
Exercise C: Correct the Error
- Are we meeting in Sunday?
- Good night. How are you?
- The snow looks beautiful in the night.
- My exam is in Monday morning.
- The parcel arrived yesterday night.
- Let’s meet in the night.
Answers: 1-on Sunday, 2-Good morning/afternoon/evening. How are you? (Good night cannot greet), 3-at night, 4-on Monday morning, 5-last night, 6-at night
Exercise D: Good Morning vs Good Night Usage
When do you say Good Morning vs Good Night? Write 2 situations each.
Special Tips
1. The Night Exception Memory Trick: Remember: NIGHT is always the troublemaker!
- in the morning/afternoon/evening but at night
- this morning/afternoon/evening but tonight (not this night)
- yesterday morning/afternoon/evening but last night (not yesterday night)
- Good morning/afternoon/evening = Hello, but Good night = Bye!
Write this chart and stick on wall for 1 week.
2. The ON Rule Priority: Whenever you see a day name (Monday, Tuesday, Sunday), forget IN/AT and use ON. Even if you have morning/afternoon/evening/night after it: ON Tuesday morning wins over IN THE MORNING.
3. The American vs British:
- American: “on the weekend” often, but British: “at the weekend”
- For morning/afternoon/evening/night, both American and British follow same rules above. No difference.
Competitive Exam Suggestions (IELTS, TOEFL, GRE)
1. IELTS Listening – Section 1 & 2: Time prepositions are tested in EVERY IELTS Listening test. Example audio: “Let’s meet on Tuesday morning” – if you write “in Tuesday morning” you lose a mark. “Last night” vs “yesterday night” – wrong preposition = wrong spelling = lose mark. Practice dictation of time expressions.
2. IELTS Speaking – Part 1 (Daily Routine): Question: “What do you do in the morning?” Correct answer: “I usually read in the morning” not “at the morning”. Using “at night” correctly shows grammar range. Also, greeting examiner: Say “Good morning” if exam is morning, “Good afternoon” if afternoon. Never say “Good night” when you enter – examiner will notice.
3. TOEFL & PTE – Grammar & Speaking: PTE Fill in the Blanks often tests “in the morning / at night / on Monday morning”. Remember the priority: Day = ON. TOEFL Speaking: Using “tonight, last night, tomorrow night” correctly improves fluency score.
4. Business Email Writing: For formal emails: “Let’s meet on Tuesday morning” (professional) not “in Tuesday morning” (error). “I’ll send it this afternoon” (today) vs “I’ll send it tonight” (correct, not this night). Small preposition mistakes make you look unprofessional in business context.
Master these 6 patterns, and you will never make time preposition mistakes again. Review the chart daily for one week and use them in your own sentences.
