Grind a row of letters until you stop making mistakes, then add another row. Press the Play sound link to make sure you are pronouncing the letters correctly.
harakat or Arabic diacritics tell you about the pronunciation of letter, they act like vowel on english, they are marks you put on the character
is equivalent to vowel "a" on english
is equivalent to vowel "i" on english
is equivalent to vowel "o" on english