1. Para esclarecer.
You have to study for the test really hard. Now, that doesn´t mean you can´t stop for an hour to relax.
2. Para expressar dúvida.
A – How nice to see you! We should get together sometime. It´s been ages.
B – Yeah, totally. Now, tell me again, where do you know me from?
3. Para mostrar o próximo passo de um processo.
A – If we hire good teachers, we can open a very successful language school.
B – Of course. Now, all we have to do is get the money to start the school.
4. Para elogiar ou demonstrar admiração.
A – I like Beethoven.
B – Ah, Beethoven. Now that´s a great composer!
5. Para chamar a atenção.
Now, listen everybody. There´s something really important I need to say.
6. Para dizer o que você vai fazer ou quer fazer.
Now, let me start doing my homework otherwise I won´t finish it in time.