Being An Expert in English - Advanced

We've all met people who know lots of things on certain topics. Here are ten expressions that we can use to describe these people.

10 expressions to Use In Speaking And Writing: 
  1. He knows all about photography.
  2. He's a camera expert.
  3. He's an expert on digital cameras.
  4. There's nothing he doesn't know about X
  5. He knows photography inside out.
  6. You wouldn't believe what he knows about X
  7. He's a walking encyclopaedia of X
  8. Photography's his subject.
  9. He knows it from A - Z.
  10. He's an authority on digital cameras.
How To Use These Phrases In Your English: 
  1. We use phrase 1 to say that a person knows a large amount on a certain topic.
  2. Phrases 2 and 3 use the key term 'expert' in different ways. Phrase 2 is slightly stronger.
  3. Phrase 4 is using an exaggeration to say that another person is very knowledgeable.
  4. Phrase 5 is a common expression. You can also use it to say that somebody knows a place very well.
  5. Phrase 6 is a stronger version of phrase 4, and implies that it is incredible that he knows so much.
  6. Phrase 7 is a humorous expression to use when someone knows a lot about a subject.
  7. Phrase 8 is quite a general comment. It implies you like it - but you may not be an expert.
  8. Phrase 9 shows that another person knows a subject completely from beginning to end.
  9. Phrase 10 is quite a formal phrase, and is often used in an academic context.

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