- 你是不是刚认识他？
Did you just get to know him?
- 许多词是根据拼写来发音的，不过有些不是。
Many words are pronounced according to the spelling but some are not.
- 我们是不是直飞美国？
Are we making a nonstop flight to the U.S.?
- 他还没有来，不知道是不是发生了甚么意外？
He has not come yet. Something may have happened to him.
- 我既不是雅典人也不是希腊人。
I am not an Athenian, nor a Greek.
- 你对她是不是一见钟情？
Did you fall in love with her at first sight?
- 不是因为某人不理事实它们就会不复存在了。
Facts do not cease to exist because they are ignored.
- 这把伞是不是你的？
Is this your umbrella?
- 她问我是不是发生了什么事。
She asked me if anything was the matter.
- 那是幢高楼，不是吗？
That is a high building, is it not?
