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Hi,

Could someone tell me the right of using prepositions such as 'on', 'at' and 'in'.
For example,
which is the right way of saying:
1. Call me on my cellphone OR
2. Call me at my cellphone

If I want to say that "I am in school" as in I am physically inside the school building. Do I say,
1. I am in school (from what I understand, 'I am in school' usually refers to actually going / attending school)OR
2. I am at school.
What is the distinction between the use of 'in' and 'at' Always very confusing.

Which sentense is correct? OR, if they are both correct, what's the nuance difference between the two?
1. I am planning to go to ........
2.I am planning on going ..........

Thanks in advance to the people who answer to these questions.(usually Clive?, thanks)
This English forum is always very helpful.
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Hi Lereve
First of all, have you tried using the forum's search function? There are definitely lots of threads about 'on', 'at' and 'in' already.
lereveCould someone tell me the right of using prepositions such as 'on', 'at' and 'in'.
For example,
which is the right way of saying:
1. Call me on my cellphone OR
2. Call me at my cellphone
In American English, I would expect people to use the first sentence ('on').
lereveIf I want to say that "I am in school" as in I am physically inside the school building. Do I say,
1. I am in school (from what I understand, 'I am in school' usually refers to actually going / attending school)OR
2. I am at school.
What is the distinction between the use of 'in' and 'at' Always very confusing.
I am in school. = I am currently attending school/classes.
I am at school. = School is my general location.
I am in the school. = This suggests "physically inside the school building".
lereveWhich sentense is correct? OR, if they are both correct, what's the nuance difference between the two?
1. I am planning to go to ..
2.I am planning on going ..
I'd say they can usually be used interchangeably, but I'd say 'planning on going' might tend to be used more often when the plan is already very concrete. Others may have different opinions about that, though.
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on my cellphone
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Here are some meanings to be aware of.

in school -- enrolled in a course of study and attending classes (rather than earning a living working full time, for example)

at school -- participating in the activities associated with the experience of attending school

-- What does Jack do?
-- He's still in school. He'll be graduating in another year. After that, he hopes to get a job with IBM.

-- What is Jack doing?

-- He's at school. They're learning fractions this week.

The perplexing thing is that in the second case, you can also use He's in school to mean the same thing as He's at school.
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planning to go is virtually indistinguishable from planning on going. Personally, I find that the second has a more casual feel than the first.

CJ