Could you please tell me the difference between has vs has been. 1) the idea has deleted vs. : 2) the idea has been deleted what is the difference between these two?

She doesn't have a book. Why is the first sentence wrong? We use 'has' with singular, and 'she' is singular. The question asked covers more ground than just have or has. I think op's example is just one example and the question asked is in order to know if who agrees with the verb when who is subject of this verb.

I think op's example is just one example and the question asked is in order to know if who agrees with the verb when who is subject of this verb.