却=可是 1、你想用“却”造句，却想不出句子。 2、你有一个问题，却总是想不出答案。 3、你提了一个问题，却没有人来回答。 前句是一个愿望，后句是一个转折，你可以用“却”字来转折。

This word expresses the meaning of turning, like the usage of "but" and "however" in English.

Example :我以为会下雨，却没有下

I thought it was going to rain, but it didn't .

Do you mean 卻 maybe? If so, it is used to describe contrast or you can think it as "but, however". For instance, 我想買飯吃口袋卻沒錢 Hopefully this might be helpful.

我爱你，可是你却爱着他！

我想去北边，却走到了东边，唉，脑子糊涂了