I have finished my research project.
Eu terminei meu projeto de pesquisa.
He has read a lot of books.
Ele leu vários livros.
I have not finished my research project. / I haven’t finished my research project.
Eu não terminei meu projeto de pesquisa.
He has not read a lot of books. / He hasn’t read a lot of books.
Ele não leu vários livros.
Have you finished your research project?
Você terminou seu projeto de pesquisa?
Has he read a lot of books?
Ele leu vários livros?