Here are some rules for the use of Apostrophe 's' or possessive nouns.

 

Rule: Possessive case is used with the nouns of living things.
Ex: 

  • This is Sachin’s bat.
  • The car’s wheel is punctured (Wrong)
    The wheel of the car is punctured (Correct)

 

Rule: Non-living things are used in possessive case when they are personified.
Ex:

  • Ramu is at deth’s door.
  • This is earth’s surface.

 

Rule: Possessive case is used with nouns denoting space, time or weight.
Ex:

  • I want a day’s leave.
  • Shila will be back in a month’s time.

 

Rule: If two or more noun jointly possess something then possessive sign is put on the latter only.
Ex:

  • Sachin and Saurav’s partnership was awesome.
  • This is Rahul and Sonam’s shop.

 

Rule: If else is used after somebody, anybody, nobody etc then apostrophe is used with else.
Ex:

  • I obey your orders and nobody else’s.
  • This watch is not mine, it is somebody else’s.

 

Rule: Apostrophe is not used with possessive pronouns like; his, hers, yours, mine, ours, its, theirs, etc

 

Rule: Apostrophe is not used with two consecutive nouns.
Ex:

  • Sonal’s car’s colour is very nice. (Wrong)
    The colour of Sonal’s car is very nice. (Correct)