Knowledge is Power

He read a book.” What is the name of this tense?
He read a book is past tense.

We know the word (read) is verb. and the three forms of the above word (read ) is:

(1) present form= Read

(2) past form =. Read

(3) past participle form= Read.

It is seen three forms are same of the above word (read).

The subject of the above sentence is (he)and it is third person singular number.

So if we write a sentence in present form then according to rule it is necessary to add the letter (s or es) with the present verb and so in the above sentence we will use( reads) instead of read in present indefinite tense.

So the above sentence will be written as present indefinite tense: [He reads a book].

So in conclusion it can be said that in the above sentence as the letter (s, or es)is not added with the verb (read), so the sentence [He read a book] has been considered as past tense.

The correct answer of the sentence "divide the oranges between three of you is" :
"Divide the oranges among three of you"
More than two we have to use "Among"