Question

Do you know the difference between when you need to use "the" and when you don't need it?

I'm not english speaker can you teach me about itt?

Answer 1

There is no absolute answer to this. The use of "the" is even different, at times, between British English and American English.

Read about this in MANY of the websites in these search results:
http://www.google.com/search?q=when+to+use+%22the%22&oq=when+to+use+%22the%22&aqs=chrome..69i57j0l5.9235j0j7&sourceid=chrome&ie=UTF-8

Answer 2

If you are talking about some particular thing or place or person then you must use "the".
If you are talking about any particular position.

Answer 3

You should use "the".