النَّاسِ

A word in the Arabic language will either be 1) a verb or 2) a noun or 3) a particle – النَّاسِ is a noun

A noun may either be 1) Definite or indefinite 2) Masculine or feminine 3) Singular, dual or plural 4) Nominative, accusative or genitive

النَّاسُ is the natural state of this definite noun and it changes to النَّاسِ due to: 1) a preposition that precedes it or 2) a possessed noun that precedes it or 3) it’s a noun of dependent declension a) نَعْتٌ / صِفَطٌ adjectives b) التَّوْكِيْدُ emphatic c) المَعْطُوْفٌ conjunction d) البَدَلُ synonym

Human being, Mankind

To swing, halt in a place, move, toss

Grammatical analysis of النَّاسِ
اسْمٌ مَجْرُوْرٌ بِالكَسْرَةِ الزَّاهِرَةِ 
مَعْرِفَةٌجَمْعٌمُذَكَّرٌمَرْفُوْعٌن و سبَاب نَصَرَفَعْلٌنَاسَ يَنُوْسُاسْمٌاِسْمُ الجِنْسِ
DefinitePluralMasculineNominativeRootMankindPatternنNounGeneric or common noun
The people
Men
Human being
Surah/Below are the 142 verses in the holy Quran containing the genitive, definite, common nounالنَّاسِ
Verse
And of mankind there are some who say: “We believe in Allah and the last day”وَمِنَ النَّاسِ مَنْ يَقُوْلُ ءَامَنَّا بِاللهِ وَبِالْيَوْمِ الآخِرِ
2-8but they are not of the believersوَمَا هُمْ بِمُؤْمِنِيْنَ
And when We took the covenant of the Children of Israelوَإِذْ أَخَذْنَا مِيْثَاقَ بَنِي إِسْرَآئِيْلَ
Worship none but Allah (SWT) and be excellent to parentsلَا تَعْبُدُوْنَ إِلَّا اللهَ وَبِالوَالِدَيْنِ إِحْسَانًا
and to kindred and to orphans and to the needy and speak excellently to the peopleوَذِيْ القُرْبَى وَاليَتَامَى وَالمَسَاكِيْنِ وَقُوْلُوْا لِلنَّاسِ حُسْنًا
and establish the prayer and give the obligatory taxوَأَقِيْمُ الصَّلَاةَ وَءَاتُوْا الزَّكَاةَ
2-83Then you turned away except a few among you and you were refusingثُمَّ تَوَلَّيْتُمْ إِلَّا قَلِيْلًا مِّنْكُمْ وَأَنْتُمْ مُعْرِضُوْنَ
Say “If the home of the Hereafter with Allah (SWT) be for you exclusivelyقُلْ إِنْ كَانَتْ لَكُمُ الدَّارُ الآخِرَةُ عِنْدَ اللهِ خَالِصَةً
2-94out of all mankind then wish for death if you are truthful”مِّنْ دُوْنِ النَّاسِ فَتَمَنَّوُا المَوْتَ إِنْ كُنْتُمْ صَادِقِيْنَ
And surely you will find them the greediest of mankind for life greedier than the polytheistsوَلَتَجِدَنَّهُمْ أَحْرَصَ النَّاسِ عَلَى حَيَاةٍ وَمِنَ الَّذِيْنَ أَشْرَكُوْا
Each one of them loves if he could be granted a life of a thousand yearsيَوَدُّ أَحَدُهُمْ لَوْ يُعَمَّرُ أَلْفَ سَنَةٍ
but it will not remove him from the punishment, the grant of such a lifeوَمَا هُوَ بِمُزَهْزِحِهِ مِنَ العَذَابِ أَنْ يُعَمَّرَ
2-96and Allah (SWT) is All-Seeing of what they doوَاللهُ بَصِيْرٌ بِمَا يَعْمَلُوْنَ
When the Lord of Ebrahim (AS) tried him with words which he fulfilledوَإِذِ ابْتَلَى إِبْرَاهِيْمَ رَبُّهُ بِكَلِمَاتٍ فَأَتَمَّهُنَّ
“Verily I will make you a leader for the people”قَالَ إِنِّي جَاعِلُكَ لِلنَّاسِ إِمَامًا
(Ebrahim AS) said “and from my offspring?”قَالَ وَمِنْ ذُرِّيَّتِي
2-124He (Allah SWT) said “My covenant does not reach the wrong-doers”قَالَ لَا يَنَالُ عَهْدِي الظَّالِمِيْنَ
And when We made the house a place of return and safety for the peopleوَإِذْ جَعَلْنَا البَيْتَ مَثَابَةً لِّلنَّاسِ وَأَمْنًا
“Take the place of Ebrahim (AS) as a praying place”وَاتَّخِذُوْا مِن مَّقَامِ إِبْرَاهِيْمَ مُصَلَّى
and We entrusted Ebrahim (AS) and Ismael (AS) to purify My House for those who circle itوَعَهِدْنَآ إِلَى إِبْرَاهِيْمَ وَإِسْمَاعِيْلَ أَنْ طَهِّرَا بَيْتِيَ لِلطَّآئِفِيْنَ
2-125who meditate and who bow and prostrateوَالعَاكِفِيْنَ وَالرُّكَّعِ السُّجُوْدِ
The fools among the people will sayسَيَقُوْلُ السُّفَهَآءُ مِنَ النَّاسِ
“What has turned them from their prayer direction which they used to face”مَا وَلَّاهُمْ عَنْ قِبْلَتِهِمُ الَّتِي كَانُوْا عَلَيْهَا
Say “To Allah (SWT) belongs the east and the westقُلْ لِلَّهِ المَشْرِقُ وَالمَغْرِبُ
2-142He guides whom He wills to the Straight Path”يَهْدِي مَنْ يَشَآءُ إِلَي صِرَاطٍ مُّسْتَقِيْمٍ
2-143 
2-150 
2-159 
2-161 
2-165 
2-185 
2-187 
2-188 
2-189 
2-200 
2-204 
2-207 
2-213 
2-219 
2-221 
2-224 
2-243 
2-259 
2-264 
3-4 
3-9 
3-14 
3-21 
3-68 
3-79 
3-87 
3-96 
3-97 
3-110 
3-112 
3-134 
3-138 
3-140 
3-187 
4-38 
4-58 
4-79 
4-105 
4-108 
4-114 
4-161 
4-165 
5-49 
5-67 
5-82 
5-97 
5-116 
6-91 
6-122 
7-116 
7-144 
7-187 
8-47 
8-48 
9-3 
9-34 
10-2 
10-11 
10-60 
10-92 
11-17 
11-119 
12-21 
12-38 
12-40 
12-46 
12-68 
12-103 
13-1 
13-6 
14-25 
14-36 
14-37 
14-52 
16-38 
16-44 
16-69 
17-60 
17-89 
17-106 
18-54 
19-21 
21-1 
21-61 
22-3 
22-8 
22-11 
22-18 
22-25 
22-27 
22-65 
22-75 
22-78 
24-35 
25-37 
25-50 
26-39 
27-73 
28-23 
28-43 
29-10 
29-43
30-6
30-8
30-30
30-39
30-41
30-58
31-6
31-18
31-20
32-13
34-28
34-36
35-2
35-28
38-26
39-27
39-41
40-57
40-59
40-61
45-20
45-26
47-3
48-20
57-25
59-21
62-6
83-2those who, when they take a measure from the people, they take in fullالَّذِيْنَ إِذَا اكْتَالُوا عَلَى النَّاسِ يَسْتَوْفُوْنَ
114-1Say, I seek refuge with the Nurturer of mankindقُلْ أَعُوُذُ بِرَبِّ النَّاسِ
114-2The Owner/King of mankindمَلِكِ النَّاسِ
114-3The God of mankindإِلَاهِ النَّاسِ
114-5Who whispers into the breasts of mankindالَّذِي يُوَسْوِسُ فِيْ صُدُوْرِ النَّاسِ
114-6From the jinn and mankindمِنَ الْجِنَّةِ وَالنَّاسِ

Valuable resources:

النَّاسِ occurrence

Dictionary of the holy Quran by Abdul Mannan Omar

Learn Quranic Arabic online dvds

Download study materials, notebooks 1, 2, 3, notes etc