Monophthongs, Diphthongs and Consonants

Monophthongs are a sound of a simple vowel. In the mono thongs we have front, central, and back vowels.

Diphthongs are two vowels produced consecutevely in the same syllable by moving the articulators smoothly from the position of  one to the other.

If you click this link you will find the front, central, and back vowels with their pronunciation, and also you will find the diphthongs with thier pronunciation:

http://www.uiowa.edu/~acadtech/phonetics/english/english_main.swf

When you click this link you will find a page which contains a series of monothongs and diphthongs:

http://usefulenglish.ru/phonetics/practice-vowel-contrast

In this link you will a very useful information about monophthongs and diphthongs, also in this page are examples and some interesting videos about it:

http://www.really-learn-english.com/english-pronunciation-lesson-17-dipthongs.html

This is another interesting link in which you will find exercises about monophthongs and diphthongs:

http://www2.vobs.at/ludescher/pdf%20files/Pronunciation%20exercises.pdf