I need to know how and when to use these.. ?

Question

has/have/had and do/did/does

and is it right to say.. I DIDNT TOOK IT.. or it should be.. I DIDNT TAKE IT..

Answer 1

He has 3 apples.

I have 3 apples.

He had 3 apples.

I do have homework.

I did my homework.

She does have homework.

I didn't take it

Answer 2

you need a grammar book because it's not a 5 min explanation that will help... it's about Tenses and Auxiliary Verbs

Answer 3

I have

You have

he/she/it has

we/they have

had is past tense, or pluperfect

If you are using to have as a helping verb, you follow it with the PAST PARTICIPLE.  

do is present tense, for all but he/she/it does.

did is past tense

And you follow do/did/does with the INFINITIVE (without the to), making "I didn't take it" correct, and "I didn't took it" wrong.  

I didn't take, I don't take, He DOES take (that would be emphatic) or he didn't take.  

In modern English, something like He took not, would NOT make sense.  (although, as I am watching Star Wars with my kid and his friends right now, I think Yoda might say that.:)  )

So difficult for foreign learners to get right!  So many examples!