A preposition is a word placed before a noun or pronoun to show its relation to another word.
- The book on the table is mine.
- Manu and Anu are friends.
- You can come by bus or by train.
- I would like to go, but i am busy.
- Ah! I have hurt my foot. [Ah! is a cry of pain]
- Hurry! we have won the match. [ The interjection 'hurry' is a shout of joy or welcome]
- Bravo! well hit. [The interjection 'Bravo' is used to express joy when somebody has done well]