She couldn't make up her mind whether to go or not.

她又想去，又不想去，拿不定主意。

《新英汉大辞典》

You'd better decide for yourself whether to go or not.

究竟去不去，你自己拿主意吧。

《新英汉大辞典》

We're debating whether or not to go skiing this winter.

我们盘算着今年冬天是否去滑雪。

《牛津词典》

One of the reasons for thinking it's not clear whether the argument fails or not is because it's hard to pin down, where exactly did it go wrong?

并不能确定这个论证是否成立,的其中一个原因就是,我们很难确定,到底是哪里出了问题

耶鲁公开课 - 死亡课程节选

Somebody may decide whether I get to go to sleep or not, whether I get to eat or not...if there is any leftovers, that is my food.

CENTERFORSECURITYPOLICY: Center For Security Policy

But unless Iraq's regime dramatically changes its behaviour and starts giving up its weapons rather than hiding them, France will soon have to choose whether or not to go along with tougher action.

ECONOMIST: Time for Iraq to disarm peacefully is fast running out

Mr Wilson and Mrs Thatcher could hardly have been more different, but both based their decisions about whether to go to war or not on a clear idea of national interest.

ECONOMIST: Bagehot