It is frequent for most people, as they learn a language, to assume that to rely on their own accents as they speak a different language will do. Unfortunately this is far from reality and as a matter of fact, not focusing in the correct accent and pronunciation can lead to misunderstandings or simply poor communication.
When it comes to writing, English language uses 26 different letter from the Alphabet, however, when it comes to speaking there are over 44 different sounds that can be made through this language. We call these sounds phonemes.
A phoneme is a sound unit that that is used to create contrast between different sounds.
Identifying these sounds may be difficult in the beginning but with some further knowledge and practice you will be able to master them all. There are, of course, 44 writing characters to represent these phonemes that, all together, make a “phonemic alphabet”.