Question

We give up before we try (add question tag)

Answer 1

We give up before we try, dont we?

Answer 2

Your answer is:

$\text{ \blue{We give up before we try, don't we?}}$

When we form question tag,

If the sentence has 'not' in it, then question tag won't have 'not'.

If the sentence doesn't have 'not' in it, then question tag will have 'not' in it.