Question

Neema can't find her keys. She is doesn't know where they are. They are lost. convert to Present perfect tense

Answer 1

Neema is not finding her keys.she is not aware of where they are

Answer 2

First I want to tell you that your given sentence is grammatically wrong.

Well, in present perfect tense:

Neema has not found her keys. She has not known where they are. They have lost.

hope it will help you