now, now—
1. is used as a friendly way of telling smb. not to behave in a particular way:
- Now, now, there’s no need for name calling. I raised you better than that!
2. is used as a friendly way of trying to comfort a person:
- “Now, now,” the doctor said, taking her gently by the hand.
now then—is used to attract people’s attention when one wants to say smth.:
- He uncovered the dish boldly and said: “Now then, who’s for more turkey?”