Introduction to the English pronunciation

We ''ll start withe the vowel letters which are" a/e/i/o/u". we'll discuss "a" vowel at the first:"a" is pronounced /a/ in two situations:

1- if it comes after a consonant and before one consonant that ends the word,like: ( plan/fat/man)

2- if it comes after a consonant and before two consonants, like: (back or black)

"a" is pronounced /ei/ if:1- it comes after a consonant and before one consonant followed by a vowel, like, (take, plane)
"a" is prononced /o/ if:1- it comes before "l", like, ( all, tall, call)