3- (Done) How to use IN and ON in English. Avoid these Common Mistakes with PREPOSITIONS in English, PART 2

Source: https://www.youtube.com/watch?v=IVnxhm5rm-w

Answer: B) on

Explanation: We say on the phone when using or talking through it. “On” is used for communication or technology devices.

Which preposition is correct?
He is talking ___ the phone.

A) in
B) on
C) at
D) by

Answer: C) She is on the computer.

Explanation: “On the computer” means using the computer. “At the computer” is possible, but “on” is more natural when referring to activity.

Which sentence is correct?

A) She is in the computer.
B) She is at the computer.
C) She is on the computer.
D) She is by the computer.

Answer: C) He is watching cartoons on TV.

Explanation: We use “on TV” for shows or programs broadcasted through the television.

Choose the correct sentence:

A) He is watching cartoons in TV.
B) He is watching cartoons at TV.
C) He is watching cartoons on TV.
D) He is watching cartoons by TV.

Answer: B) on

Explanation: We say “on Facebook,” “on Instagram,” “on YouTube,” etc., because they are online platforms or networks.

Which preposition do we use for social media?

A) in
B) on
C) at
D) to

Answer: C) at

Explanation: “At the desk” means positioned next to or working at the desk — the correct choice when referring to studying or working.

Choose the correct preposition:
She is sitting ___ the desk.

A) in
B) on
C) at
D) over

Answer: B) on

The correct option is B) on. So the complete sentence would be: "She is sitting on the chair."

Which one is correct?
She is sitting ___ the chair.

A) at
B) on
C) in
D) over

Answer: B) on

Explanation: The jacket rests on the surface of the chair, so “on” is the correct preposition.

Where is the jacket? The jacket is ___ the chair.

A) in
B) on
C) at
D) beside

Answer: C) Both are correct, but mean different things.

Explanation: “In bed” means under the covers (for rest or sleep). “On the bed” means on top of the covers (surface).

Which sentence is correct?

A) She is reading a book in bed.
B) She is reading a book on the bed.
C) Both are correct, but mean different things.
D) Both are wrong.

Answer: B) Under the blanket, resting

Explanation: “In bed” implies lying down, covered, usually for sleeping or resting.

What does “in bed” mean?

A) Sitting beside the bed
B) Under the blanket, resting
C) Standing next to the bed
D) On the floor near the bed

Answer: C) in

Explanation: We say “stay in bed” (without “the”) when someone is ill or resting.

Choose the correct form:
He is sick. He should stay ___ bed.

A) at
B) on the
C) in
D) in the

Answer: B) on July 10th

Explanation: We use “on” for specific days and dates. → on Monday, on July 10th, on my birthday.

Which sentence is correct?

A) My birthday is in July 10th.
B) My birthday is on July 10th.
C) My birthday is at July 10th.
D) My birthday is by July 10th.

Answer: A) in summer

Explanation: We use “in” for months, years, and seasons. → in July, in 2025, in summer.

Which sentence uses the correct preposition?

A) We always travel in summer.
B) We always travel on summer.
C) We always travel at summer.
D) We always travel by summer.

Answer: A) at 10 a.m.

Explanation: We use “at” for exact times. → at 6 o’clock, at noon, at midnight.

Choose the correct one:

A) The meeting is at 10 a.m.
B) The meeting is in 10 a.m.
C) The meeting is on 10 a.m.
D) The meeting is by 10 a.m.

Answer: A) on Monday morning

Explanation: We use “on” for days and day + part of day. → on Monday morning, on Friday night.

Which is correct?

A) The exam is on Monday morning.
B) The exam is in Monday morning.
C) The exam is at Monday morning.
D) The exam is by Monday morning.

Answer: C) at

Explanation: We use “at” for a point in time — at the end, at the beginning, at night.

Choose the correct preposition:
Eid al-Fitr is celebrated ___ the end of Ramadan.

A) in
B) on
C) at
D) by

Answer: D) during Ramadan

Explanation: We use “during” for a period of time or event. → during Ramadan, during the holiday.

Which sentence is correct?

A) Muslims fast on Ramadan.
B) Muslims fast in Ramadan.
C) Muslims fast at Ramadan.
D) Muslims fast during Ramadan.

Answer: C) at Christmas

Here’s the explanation:

Correct options:

B) We exchange gifts on Christmas.
C) We exchange gifts at Christmas.

These are both correct, but they have slightly different uses:

• “On Christmas” = refers to the specific day, December 25.
  Example: We exchange gifts on Christmas (meaning on the actual day).

• “At Christmas” = refers to the general Christmas period/season.
  Example: We exchange gifts at Christmas (around that time of year).

**Conclusion:**

Both **B** and **C** can be correct depending on dialect and intended meaning, but if you must choose only one, **C (“at Christmas”)** is often preferred in British English for the general holiday period, while **B (“on Christmas”)** is more common in American English for the specific day.

If this is a test question expecting one answer, **B (“on Christmas”)** is most widely accepted in American English usage.

Which is correct?

A) We exchange gifts in Christmas.
B) We exchange gifts on Christmas.
C) We exchange gifts at Christmas.
D) We exchange gifts by Christmas.

Answer: Both B (British English) and A (American English)

Explanation:

• British English: at the weekend

• American English: on the weekend

Choose the correct sentence:

A) I’ll see you on the weekend.
B) I’ll see you at the weekend.
C) I’ll see you in the weekend.
D) I’ll see you by the weekend.

Answer: B) in

Explanation: We use “in” for years and months. → in 2019, in July.

Which preposition completes the sentence?
They got married ___ 2019.

A) on
B) in
C) at
D) during

Answer: D) Both A and B are correct depending on meaning.

Explanation:

• On Eid → refers to the day itself. (on Eid day)

• At Eid → refers to the general time or season of Eid.
  Both are correct, depending on context.

Which sentence is correct?

A) We will visit my grandparents on Eid.
B) We will visit my grandparents at Eid.
C) We will visit my grandparents in Eid.
D) Both A and B are correct depending on meaning.

Answer: B) in September

Explanation: We use “in” for months. → in July, in September.

Which sentence is correct?

A) School starts on September.
B) School starts in September.
C) School starts at September.
D) School starts by September.

Answer: B) in

Explanation: We use “in” for years. → in 1999, in 2020.

Choose the correct preposition:
They first met ___ 2020.

A) on
B) in
C) at
D) during

Answer: A) in summer

Explanation: “In” is used for seasons. → in summer, in winter.

Which is correct?

A) We usually travel in summer.
B) We usually travel on summer.
C) We usually travel at summer.
D) We usually travel by summer.

Answer: B) in

Explanation: We can say “in Ramadan” to mean at some time during the month of Ramadan. “During Ramadan” is also fine, but “in” fits the same rule as months.

Choose the correct preposition:
I’ll visit my family ___ Ramadan.

A) on
B) in
C) at
D) during

Answer: C) on July 3rd

Explanation: We use “on” for specific dates. → on July 3rd, on March 10th.

Choose the correct sentence:

A) My flight is in July 3rd.
B) My flight is at July 3rd.
C) My flight is on July 3rd.
D) My flight is by July 3rd.

Answer: B) on July 4th

Explanation: “On” is used for exact dates and days. → on July 4th (U.S. Independence Day).

Which is correct?

A) Independence Day is in July 4th.
B) Independence Day is on July 4th.
C) Independence Day is at July 4th.
D) Independence Day is by July 4th.

Answer: A) in

Explanation: “In” is used for years. → in 2025, in 2030.

Choose the correct option:
I’ll finish the project ___ 2025.

A) in
B) on
C) by
D) at

Answer: B) on July 10th, 2024

Explanation: “On” is for specific calendar dates. → on July 10th, 2024.

Which is correct?

A) The wedding is in July 10th, 2024.
B) The wedding is on July 10th, 2024.
C) The wedding is at July 10th, 2024.
D) The wedding is by July 10th, 2024.

Answer: A) in May

Explanation: “In” is for months when we don’t mention the exact day.
→ in May, but on May 12th.

Choose the correct sentence:

A) My sister was born in May.
B) My sister was born on May.
C) My sister was born at May.
D) My sister was born by May.

Answer: C) at 9 a.m.

Explanation: We use “at” for exact clock times. → at 7 o’clock, at midnight.

Which sentence is correct?

A) The meeting starts in 9 a.m.
B) The meeting starts on 9 a.m.
C) The meeting starts at 9 a.m.
D) The meeting starts by 9 a.m.

Answer: C) at night

Explanation: We use “at” for night, the weekend, and special times of the day. → at night, at noon.

Choose the correct sentence:

A) He always goes to bed in night.
B) He always goes to bed on night.
C) He always goes to bed at night.
D) He always goes to bed by night.

Answer: A) at noon

Explanation: “At” is for exact times. “At noon” = 12:00 p.m.

Which is correct?

A) We usually have lunch at noon.
B) We usually have lunch on noon.
C) We usually have lunch in noon.
D) We usually have lunch by noon.

Answer: C) at

Explanation: “At” is used for a specific moment of the day. → at sunrise, at sunset.

Choose the correct preposition:
We will leave the office ___ sunset.

A) on
B) in
C) at
D) by

Answer: A) by 5 p.m.

Explanation: “By” means not later than that time — anytime before or at 5 p.m. is acceptable.

Which sentence is correct?

A) I need the report by 5 p.m.
B) I need the report at 5 p.m.
C) I need the report in 5 p.m.
D) I need the report on 5 p.m.

Answer: C) by Monday

Explanation: “By Monday” means before Monday ends. It’s a deadline.

Choose the correct option:
You must finish your homework ___ Monday.

A) on
B) in
C) by
D) at

Answer: B) on time

Explanation: “On time” means punctually, not late. → The train left on time.

Which sentence is correct?

A) The movie started in time.
B) The movie started on time.
C) The movie started by time.
D) The movie started at time.

Answer: A) in time

Explanation: “In time” means early enough to do something. → We arrived in time to catch the bus.

Choose the correct sentence:

A) We arrived in time to catch the bus.
B) We arrived on time to catch the bus.
C) We arrived by time to catch the bus.
D) We arrived at time to catch the bus.

Answer: C) Both, but with different meanings.

Explanation:

• On time = punctual, not late for the meeting.

• In time = early enough before something started (maybe just before it began).

Which one is correct?

A) She came on time for the meeting.
B) She came in time for the meeting.
C) Both A and B are correct, but with different meanings.

Answer: C) before or at 8 p.m.

Explanation: “By 8 p.m.” means no later than 8 p.m. — any time before or exactly at 8 is fine.

Choose the correct meaning of the phrase:
“You need to arrive by 8 p.m.”

A) You must come exactly at 8 p.m.
B) You can come any time after 8 p.m.
C) You can come any time before or at 8 p.m.
D) You must come much earlier than 8 p.m.

He arrived just on time → Also correct, but different meaning

Meaning:
He arrived exactly at the right time — not early, not late.

Example:

• He arrived just on time for the meeting at 9:00.

• The plane landed just on time despite the bad weather.

Think: exactly punctual — the scheduled or expected time.

He arrived just in time → Correct and natural

Meaning:
He arrived a little before something happened — early enough to do or see something important.

Example:

• He arrived just in time to catch the train.

• She called me just in time — before I left the house.

Think: barely early enough — maybe one or two minutes before it was too late.

Answer: C) in time

Explanation: In time = early enough to do something before it starts.

The movie started at 7:00, and we got to the cinema at 6:55. We arrived ___ to buy popcorn.

A) on time
B) at time
C) in time
D) before time

Answer: B) on time

Explanation: On time = punctual, at the exact scheduled moment.

The train left exactly at 8:00, and it didn’t delay. It departed ___ .

A) in time
B) on time
C) before time
D) at time

Answer: A) in time

Explanation: Just in time means you almost missed it, but made it before it began.

I woke up late but managed to get to class just ___ .

A) in time
B) on time
C) before time
D) by time

Answer: B) on time

Explanation: On time = punctual; the flight arrived exactly as scheduled.

The flight was supposed to land at 10:30, and it landed at exactly 10:30. The plane arrived ___ .

A) in time
B) on time
C) by time
D) early

Answer: C) in time

Explanation: In time = before it was too late; he made it before the deadline or event (the flight).

He forgot his passport but returned home ___ to catch his flight.

A) on time
B) before time
C) in time
D) at time

Answer: B) on time

Explanation: On time = exactly punctual, not early, not late.

The meeting began at 2:00. She entered the room at exactly 2:00. She was ___ .

A) in time
B) on time
C) before time
D) at time

Answer: A) in time

Explanation: In time = before the event started — they didn’t miss any part.

They arrived ___ to see the beginning of the show.

A) in time
B) on time
C) at time
D) by time

Answer: B) on time

Explanation: On time = it followed its schedule even though there were delays.

Despite the heavy traffic, the bus reached the station ___ .

A) in time
B) on time
C) before time
D) soon

Answer: B) in time

Explanation: In time = just before something bad or important happened.

She arrived just ___ to stop the baby from crying.

A) on time
B) in time
C) at time
D) before time

Answer: B) on time

Explanation: On time = at the scheduled or expected moment.

The students were told to come at 8:30, and they were all there exactly at 8:30. They came ___ .

A) in time
B) on time
C) by time
D) before time