10 the class,board examination,English grammar-usage of prepositions.

 The prepositions of and off are frequently confused because they sound similar, but their functions are entirely different.

  • Of: Used to show belonging, connection, or what something is made of (e.g., "A cup of tea," "A friend of mine").

  • Off: Used to show movement away from a position, or to indicate that something is no longer attached or functioning (e.g., "Keep off the grass," "Turn off the light").

English Grammar Practice: Of vs. Off

1. The cover _______ the book was torn and needed repair. A) off B) of C) from D) towards

2. Please make sure to switch _______ the air conditioner before you leave the room. A) of B) off C) out D) along

3. The little boy fell _______ his bicycle and scraped his knee. A) of B) off C) through D) among

4. The smell _______ fresh jasmine filled the entire garden. A) off B) from C) of D) onto

5. She took her coat _______ because the room was becoming quite warm. A) of B) off C) through D) between

6. Most _______ the students in the class-board examination were well-prepared. A) off B) of C) through D) around

7. The cat jumped _______ the table as soon as it saw the dog enter. A) of B) off C) to D) onto

8. He is a man _______ great integrity and intelligence. A) off B) of C) about D) from

9. The plane took _______ exactly at the scheduled time despite the rain. A) of B) off C) away D) through

10. The leg _______ the chair is broken, so please do not sit there. A) off B) of C) from D) along

Answer Key:

  1. B) of (Shows belonging/part of a whole.)

  2. B) off (Used with 'switch' to mean stopping a function.)

  3. B) off (Indicates movement away from a surface/position.)

  4. C) of (Shows connection/origin of the smell.)

  5. B) off (Used with 'took' to mean removing clothing.)

  6. B) of (Used to indicate a portion of a group.)

  7. B) off (Movement away from the surface of the table.)

  8. B) of (Used to describe a quality someone possesses.)

  9. B) off (The phrasal verb 'take off' means to become airborne.)

  10. B) of (Shows that the leg belongs to the chair.)

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