Rule 1: 2. إِنَّ and أَنَّ in long sentences
إِنَّ opens a statement, and also follows قَالَ and its forms: قَالَ لَهُ: إِنَّ هٰذَا شَيْءٌ صَغِيرٌ. أَنَّ makes a clause into a noun after verbs of knowing, feeling and thinking (عَلِمَ، شَعَرَ، ظَنَّ، تَذَكَّرَ) and after prepositions (لِأَنَّ، بِأَنَّ). Their predicate may be a whole sentence, including a negative or future one, so that one sentence can hold three or four clauses. For emphasis لَـ may be put on the predicate (إِنَّهُ لَصَادِقٌ), or, when a prepositional predicate stands first, on the delayed noun.
قَالَ لَهُ: «إِنَّ أَوْلَادَكَ يَسْتَحِقُّونَ حَيَاةً أَحْسَنَ».
qāla lahu: inna awlādaka yastaḥiqqūna ḥayātan aḥsana.
He said to him: "Your children deserve a better life."
كَانَ يَعْلَمُ أَنَّ أَحَدًا سَيَعْرِفُ.
kāna yaʿlamu anna aḥadan sa-yaʿrifu.
He knew that someone would know.
أَنَّ with a future predicate.
شَعَرَ أَنَّهُ يَسْتَطِيعُ أَنْ يَنْظُرَ إِلَى النَّاسِ.
shaʿara annahu yastaṭīʿu an yanẓura ilā n-nāsi.
He felt that he could look people in the face.
رَفَضَ الْمَالَ لِأَنَّ مَصْدَرَهُ حَرَامٌ.
rafaḍa l-māla li-anna maṣdarahu ḥarāmun.
He refused the money because its source was unlawful.
إِنَّ فِي الْقَلْبِ لَصَوْتًا لَا يَسْكُتُ.
inna fī l-qalbi la-ṣawtan lā yaskutu.
Truly in the heart there is a voice that is not silent.
Predicate first, so the noun takes لَـ.