A word that is usually used to show the relationship of a Noun or Pronoun with everything else in the sentence is known as a preposition.
In the above examples the words in bolds are all preposition. They are conveying the relationship between the Nouns with other things in the sentences.
Kind of Preposition
Preposition can be classified into following main kinds:
1. Simple Preposition
Ex:- At, By, For, From, In, Of, Off, Out, Till, To, Up, With etc are known as simple preposition.
The letters written in bold are preposition.
2. Compound Preposition
Those preposition which are formed by prefixing a preposition to a Noun, an Adjective or an Adverb are known as compound preposition.
Ex:- About, Behind, Beyond, Inside, Outside, Underneath, Without, Within etc are all compound preposition.
3. Phrase Preposition
Those prepositions which are a group of words used with the force of a single preposition are known as Phrase prepositions.
Ex:- According to, In accordance with, In place of, In spite of, In lieu of etc are phrase preposition.
Various Skills of the English language
Components of the English language
Forms of Verbs
Composition : Parts of composition
Analysis, Transformation and Synthesis of sentence