3- 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 use the preposition on when talking about using communication technology like a phone, computer, or radio.

My brother is busy right now. He's _____ the phone.

    a) in
    b) on
    c) at
    d) by

Answer: c) on

Explanation: For social media platforms and websites like Facebook, Instagram, or the internet, we use the preposition on.

I saw your photos! Were you _____ Facebook last night?

    a) in
    b) at
    c) on
    d) by

Answer: c) at

Explanation: We use at to describe being in the general location of a desk or table for its purpose (working, eating). We don't sit "on" the desk (unless on top of it) or "in" the desk (inside it).

She is working. She is sitting _____ her desk.

    a) on
    b) in
    c) at
    d) under

Answer: c) in

Explanation: For comfortable chairs like armchairs or sofas that you sink into, we typically use in. For simple, hard chairs, "on" is also possible, but "in" is best for a "comfortable" chair as described.

Please, come and sit _____ this comfortable chair.

    a) at
    b) on
    c) in
    d) over

Answer: c) on

Explanation: We use on for something being in contact with the surface of something else. The floor is a surface, so the shoes are on the floor.

Don't put your feet on the chair! Your shoes are dirty. Please leave them _____ the floor.

    a) in
    b) at
    c) on
    d) by

Answer: c) in

Explanation: When we talk about going to bed to sleep (under the covers), we use the phrase in bed. We do not use "the" in this context.

It's late, and I'm tired. I'm going _____ bed now.

    a) in the
    b) on the
    c) in
    d) on

Answer: d) on the

Explanation: The book is on top of the bed's surface (on the blanket/pillow), not under the covers. In this case, we use on the because we are specifying the location on a specific surface.

Where is my book? Oh, it's _____ the bed, next to the pillow.

    a) in
    b) in the
    c) on
    d) on the

Answer: c) in

Explanation: The phrase "stay in bed" is the correct idiom for resting or sleeping under the covers. We do not use "the" in this common expression.

He's not feeling well, so the doctor told him to stay _____ bed all day.

    a) in the
    b) on the
    c) in
    d) on