DETERMINER

Determiners are words that are used before a noun or a noun phrase to specify the number or amount of the noun or the noun phrase they precede. Determiners are not adjectives.Determiners fall into the following categories:(a) Articles : a,an,the (b) Possessives : my.our,your,their,its.john's etc  (c) Demonstratives: this,that,these,those (d) Numerals : fall into two categories  (i) Cardinal: one, two, five and any number like this   (ii) Ordinal: first, second.third etc (e) Quantifiers : each,either,every,neither,any,no, some, more,most,much,many.several,enough,few,a few,both,all, half,what,whatever,whichever,which  (f) Miscellaneous : other,such, only and what
The above categories may be sub-divided into the following groups for better analysis :
GROUP : A (a) Articles (b) Possessives (c) Demonstratives  GROUP : B (e) Quantifiers GROUP :C (f) Miscellaneous

Here are some Do's and don'ts of the use of Determiners:

GROUP : B determiners can be used before nouns without preposition of :Examples : 
(i) Have you received any letter today? ( Not any of letter)
(ii) Most people supported the idea of development. (Not most of people)
GROUP : B determiners can be used before nouns without using of : 

(i) Some students attended the function. (Not some of students)
(ii) Most people here live below the poverty level. (Not most of people)
But to use GROUP : B determiner GROUP : A determiners (articles,possessives,demonstratives) preposition of is to be used:
(i)  Some of the students attended the function. (Not some the students)
(ii)  Most of the people here live below the poverty level. (Not most the people)
Every and no can not be followed by of  but none and everyone are followed by of :
Compare:
(i) Every student was given a prize.(Not every of student)
(ii) No lady attended the function.(Not no of lady)
But-
(iii) None of them was punished.(Not none them)
(iv) Everyone of this family has got relief goods.(Not everyone this family)
We have to use of  before  all,half and both when they follow a pronoun but of may be dropped if all,half and both follow a noun:
Compare:
(i) All of them attended the function (ii) Half of the them attended the function. (iii) Both of them were invited here.
But- 
(iv) All (of) their decisions were not wrong. (v) Half (of) our companions left us in the hotel. (vi) Both (of) sisters studied medicine.