In / On

[Natalie27]

Thanks.

What do these mean?
1. She is working on that day.
2. She is working that day. (Is 'on' omitted here?)

Both are correct, second one is more common.

[jack]

Both are correct, second one is more common.

What's the point of using 'on' then? So 'on' is not omitted in #2?
1. She is working on that day.
2. She is working (on) that day.

[jack]

What do these mean?
1. I live on the west side. (If I'm supposed to use this one, why?)
2. I live in the east side.

3. I live in Canada.
4. I live on Canada. ('on' is incorrect here? But #1 is correct? Is it because it means that your house is the size of Canada?)

[jack]

Could someone help me with the post above? Thanks.

What do these mean? I have completely no idea about which one to use.
1. I plugged this card onto my motherboard.
2. I plugged this card into my motherboard.

[Natalie27]

Could someone help me with the post above? Thanks.

What do these mean? I have completely no idea about which one to use.
1. I plugged this card onto my motherboard.
2. I plugged this card into my motherboard.

I think it all depends on how your computer is built. I would say "into the motherboard" if your card goes directly into it. I would choose "onto" the motherboard" if the slot for the card is soldered onto the motherboard - the slot gadget would be then just an added feature.

[jack]

Thanks.

[Casiopea]

You're welcome.

[jack]

What do these mean? Does it matter if I use 'in' or 'on'?
1. You were on a car, would you get their faster? (I don't get it. If I'm on a car, I am probably in the car too?)
2. You were in a car, would you get their faster? (If I'm in a car, I'm probably on the car too?
How do you know which one to use?

3. I don't think I can come home in time.
4. I don't think I can come home on time.

[jack]

Could someone help me with the post above? Thanks.

What do these mean?
1. You can do this on your own time.
2. You can do this in your own time.