Is there any site where I can learn the appropriate use of words like: "in", "at", "on", "by"?

Answer 1

http://www.ucl.ac.uk/internet-grammar/preps/preps.htm
http://www.better-english.com/grammar/prepositions.htm
http://esl.about.com/library/grammar/blgr_prep5.htm
http://www.englishclub.com/grammar/

Answer 2

No! In the morning I get up, I get out of bed. After breakfast I leave the house, get on a bus, get off the bus, get into the lift, get out of the lift. I pick up the phone and then I hang up. Sometimes I'm down in the dumps, but most of the times I'm in seventh heaven. Trying to sort out the use of prepositions in English is a fast-track to the funny farm.

Answer 3

I tell you some
Cantonese:
in>yap bin
at>hei
on>seong bin
by>hei

Malay:
in>dalam
at>di
on>atas
by>pada

Mandarin:
in>li mian
at>zai
on>shang mian
by>yu

Answer 4

They are all prepositions. Rule one is that a preposition is a word that you must not end a sentence with. ("with" is a preposition too).