[Grammar] Preposition of places and time

[krishnangrk]

Hello,
I'm a new to this forum. English is not my native language. I've been learning English with help of Internet.
I've some doubts about using preposition in my sentences.
Here are some examples :
I was working at the xyz machine, Or I was working in the xyz machine.
And, I have enough leave on me, Or I have enough leave for me.
Also, I'm in bus or I'm at bus.

Kindly let me know which of these sentences are correct and give me some examples of using " in, at, on."
Thanks
Krish

 

[Tdol]

I was working at the xyz machine, Or I was working in the xyz machine.

If you are standing or sitting by the machine, use at. If you are talking about something like a workstation, I would use on.

And, I have enough leave on me, Or I have enough leave for me.

I have enough left for me.

Also, I'm in bus or I'm at bus.

I would say on the bus.

 

[teechar]

I have enough leave on me

By "leave" do you mean time off work?

 

[Tdol]

By "leave" do you mean time off work?

I had not thought of that- good idea. If so, I would just say I have enough leave.

 

[krishnangrk]

Yes! Leave means time off. Kindly give me some more examples.
Thanks

 

[Polyester]

I'm on the bus that's correct. But, I'm not a teacher.

 

[Matthew Wai]

Also, I'm in bus or I'm at bus.

I think you can say 'in a car' and 'at a bus stop', but I am not a teacher.