King lives in his house.
I am fond of coffee.
There is a man at the door.

The words in, of and at are Prepositions. The word preposition means, something which is placed before. Prepositions are generally placed before nouns or pronouns.

Prepositions do the following:-

  1. They join nouns to verbs. For eg. In the first sentence, the preposition in joins the noun house to the verb live.

  2. They join nouns to adjectives. For eg. In the second sentence, the preposition of joins the noun coffee to the adjective fond.

  3. They join nouns to other nouns. For eg. In the third sentence, the preposition at joins the noun man to noun door.




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Click on the links below to learn more about Prepositions:-

Between/Among
Simple Preposition
Compound Preposition
Phrase Preposition
Preposition: Adverb