Question

One good turn deserves another add a question tag

Answer 1

One good turn deserves another,doesn't it?

Answer 2

ANSWER:

The sentence after adding question tag will become 'One good turn deserves another, won't it?

EXPLANATION:

This is a positive sentence with a negative question tag. In all cases, a negative question tag is added to a positive sentence and vice versa. Here, the main clause is positive and question tag is negative. as the clause is in future perfect tense, the question tag used is “won't it”.

If the "main clause is negative", the question tag used must be positive.

Example: "We aren't late, are we"?

                 "The bus isn't coming", is it?