One cannot deny this proposal, —Tag Question?

The boys were saving money, weren't they?

Let’s have a walk outside the farm, shall we?

I am in the habit of walking every morning, aren’t I?

Morning entertains us with fresh air, doesn’t it?

No one should miss the opportunity, should they?

Have a try to form this habit of morning walk, will you?

Nothing is more pleasant than the memories of childhood, is it?

So, one can have peace and happiness in a nuclear family, can’t they/can’t one?

One need not think of others, need they/need one?

Its necessity can be denied by none.