Def: A preposition is a word placed before a noun or a noun equivalent to show its relation to some other words in the sentence.
Eg: Put it on the table.
Stand under the tree.
I am fond of music.
Types: Preposition is of six types:
a) Simple Preposition: The single word prepositions are simple preposition. Eg: In, On, At, By, To, For, Of, With, From, Over, After, Under, Up, etc.
b) Double Preposition: When two simple preposition is used to clear the sense, they are double preposition. Eg: Into, Onto, From among, From under, From within, From off, etc.
c) Compound Preposition: Preposition formed by combining more than one preposition, are called compound preposition. Eg: Across (on + cross), Behind (by + hind), Besides (by + sides), Between (by + twain), Beyond (by + yonder), But (by + out), After (of + ter), against (on + going), Below (by + low), Beside (by + side), Around (on + round).
d) Phrase Preposition: When one or more parts of speech begins and ends with a preposition, then it is phrase preposition. Eg: In front of, Because of, By means of, On account of, With reference to, On the face of, On the ground, In agreement with, In comparison with, In connection with, In spite of, In the middle of, In praise of, Instead of, On behalf of, etc.
e) Participle Preposition: Some Present participle or Past Participle are used as preposition. They are called participial preposition. Eg: Regarding, Concerning, During, Pending, Past, Considering, etc.
f) Disguised Preposition: Sometimes ‘a’ and ‘o’ are used instead of ‘on’ and ‘of’. They are called disguised preposition.
Eg: It’s five o’clock (of) now.
He goes home once a (in) month.
Rice is selling one kilo (on) a rupee.