Correct usage of IT’S and WHO’S


IT’S is the contraction of IT and IS and also of IT and HAS. WHO’S is the contraction of WHO and IS and of WHO and HAS.

Choose the equivalent of the contractions IT’S and WHO’S in the following sentences:

  1. Who’s (Who is, Who has) been calling you?
  2. Who’s (Who is, Who has) calling you now?
  3. Our friend who’s (who is, who has) just received her bonus will give us a birthday treat.
  4. Who’s (Who is, Who has) already finished the project?
  5. I’m afraid it’s (it is, it has) becoming dark.
  6. I’m afraid it’s (it is, it has) become dark.
  7. It’s (It is, It has) a new day for all of us.
  8. Who’s (Who is, Who has) going to help us solve our financial problems?
  9. (It is, It has) interesting.
  10. It’s (It is, It has) never too late to change for the better.
  11. Who’s (Who is, Who has) at the party with you?
  12. It’s (It is, It has) been a long day.


  1. Who has
  2. Who is
  3. Who has
  4. Who has
  5. It is
  6. It has
  7. It is
  8. Who is
  9. It is
  10. It is
  11. Who is
  12. It has


Study the context of the sentence.

IT’S stands for IT IS and WHO’S stands for WHO IS if the contraction is followed by the ING form of the verb. ( See sentences 2, 5, and 8.) If the contraction is followed by an adjective, an adverb/adverbial phrase, an article plus an adjective (See sentences 7, 9, 10, and 11).

IT’S stands for IT HAS and WHO’S for WHO HAS if the contraction is followed by BEEN and other past participle forms of the verb. (See sentences 1, 3, 4, 6, 12).*