The sentence has been rewritten thus:
The students are studying. One girl is writing something in her notebook. The other girl has a book. She is giving the book to the boy across the table.
Present Participle is used to indicate actions that are ongoing. The verb 'write' in the sentence above should have been presented in its -ing form, that is, writing.
There is also a problem with the preposition used in the sentence above. The girl should write in her notebook and not about her notebook.
So, the revised sentence has been indicated above.
Learn more about Preposition here:
https://brainly.com/question/17476214