Question

"Never use my computer without my permission"
it convert direct /in direct speech

Answer 1

I said to him that never use my computer without my permission

Answer 2

Answer:

My computer should/ must never be used without my permission.

Explanation:

Changing any speech from direct to indirect speech form, the object will lead the sentence and then the supporting verbs or supporting tenses will be changed accordingly.

In the sentence "Never use my computer without my permission"

The computer is the object of the conversation, thereby it becomes the object. And in this particular scheme of speech, the subject is not mentioned, but in cases like these, it should be remembered that the subject is "you". And the subject will come towards the end of the sentence. It's like a position reversal of the object and subject.

So, the new sentence can be rewritten as

"My computer should never be used (by you) without my permission."