Make questions and negative sentences: she knows english well, he bought a chocolate cake, my friend will visit a doctor tomorrow, we are reading books now

Does she snow english well?did he buy chocolate cake?Will my friend visit a doctor tomorrow?Are we reading books?

Does she know English well ?
She doesn't know English well.

Did he buy a Chocolate cake ?
He didn't buy a Chocolate cake.

Will my friend visit a doctor tomorrow ?
My friend will not visit a doctor tomorrow.

Are we reading books now ?
We aren't reading books now