a) Alphabet pronunciation
http://www.englishclub.com/pronunciation/alphabet-pronunciation.htm
b) Past tense pronunciation
http://ingles.ing.uchile.cl/otros/Pronunciation%20Regular%20PastTenseVerbs.pdf
c) Practice your reading skills and pronunciation
http://www.sadlier-oxford.com/phonics/student.cfm
http://www.funfonix.com/