Shamsiyyah (Sun) and Qamariyyah (Moon) (ArRahmaan)

(Alif is present at the beging of word or verse or ayat)

If Hamza tul Wasl or alif is followed by a Laam, it will always be read with a Fathah, e.g

Alhamd , Alfurqaan, even with the Shamsiyya Haroof, it is the same as the Laam is there, but not read e.g ArRahmaan.

Laam only occurs as the second Alphabet of a “noun”, it followes Hamzat-Ul-Wassl.it is two type.

HURFUL SHAMS (Sun alphabet)

If the letter that follows Laam (At-t’areef) has Shaddah, Laam (At-ta’reef) will not be pronounced (silent),

Laam Shamsiyyah should never have Harkat on it


or
Conversely, the ( definite article meaning "the") is prefixed to the beging of the word, and next letter is among the following group of letters then the letter 'Lam" is not  pronounced  they are



HURUFUL QAMAR (Moon alphabet):

If the letter that followes Laam At-Ta’reef does not have a Shaddah on it, Laam At’Ta’reef is Pronounced witha Sukoon on it 

Laam Qamariyyah should always have a Sukoon sign on it.

or
When the ( definite article meaning "the")is prefixed to a beging of word, and next letter is among the following group of letters then the letter 'Lam" is pronounced clearly they are:

Very important point.

If Hamzat-Ul-Wasl is preceded by a Madd letter, the letter preceding the Madd letter is directly connected to the letter that follows Hamzat-Ul-Wasl.

Please see “Alif Zaid” and “Hamzat-Ul-Wassl” post too.