THE FUNCTIONS OF A NOUN IN A SENTENCE

NOUNS can have several different grammatical functions. They can act as the subject or object of a verb , the object of a preposition ,the complement of a linking  verb , the object  complement after a transitive verb ,and an adjective used before another noun.
Nouns as subjects
A noun  can be the subject of a verb :*
* The  students were reading quietly.
*  my photos didn't come out clearly.
* Mum and Dad usually get up about 6 am,
*Is  that light switch faulty,
* Hasn't the microwave oven been repaired yet.
Nouns act as objects
A noun can be the object of  a verb:
* Have you fed the cat?
* Please don' t interrupt the speaker.

* Did you enjoy that movie ?*Did you hear the news or the weather forecast.?
*We didn't dare make a sound.
Nouns as objects of a preposition
 Remember that a preposition always has an object (the preposition are in given in the examples below):*
*I walked into the sitting room .
*He was working on his desk.
*You are standing on my toe.
*Which lecture are you going to?
*We often run along the river bank for exercise and enjoyment.
GRAMMAR HELP
THE PREPOSITION CAN BE SEPARATED FROM ITS OBJECT.THIS HAPPENS IN SOME QUESTIONS AND IN CERTAIN OTHER CONSTRUCTIONS THAT WE SHALL DEAL WITH LATER:
* WHAT GODS DO THEY BELIEVE IN?