Click to listen all the sounds, listening activity.
In the following link, you can find pairs of sounds as for example: /I:/-/I/, /S/-/Sh/. If you click on the sounds, you will find more examples and you will be able to listen to the pronunciation. More activities listen and practise.
There are different sounds depending on the place of articulation, the manner of articulation , the way the air comes out. In this link, you can listen the sounds according to their features. English pronunciation.
To check your level in English pronunciation do the tests
You can find more links about English sounds (theory and activities) on the pronunciation corner.