"却“ have many meaning especially in classical Chinese. Nowadays, it acts as a conjunctiong in most cases: 1.It the same meaing with but. for example in this sentence:"施恩来了大牢里三次,却不提防被。" 2.to express how much difference between people's assumption and the real case. for example in this sentence:"这个吓得胆战心惊、惶惶不安并满腹牢骚的人却具有掌权和发号施令的能力。" "却“ can also be verb,adverb and particle. 1.when it's a verb,it has 6 meaning. (1)step back;retreat;withdraw. eg:"却立。" (2)get rid of. eg:"了却" (3)avoid eg:"却死" (4)refuse.eg:"却绝" (5)turn back.eg"却望" (6)repeat.eg"却论" 2..when it's an adverb,it has 5 meaning (1)admittedly.eg"好却十分好了,只是一件,这孩儿生下来,昼夜啼哭,乳也不肯吃。" (2)then.eg:"却看妻子愁何在。" (3)again.eg"却又......" (4)still.eg"却是" (5)just.eg"却如" 3.when it's a particle,it meanings off,out,away.eg:"忘却"

却 is used to mark a contrast, like, "but, however, on the other hand, etc" Ex: 他去过瑞士，我却没有 我圣诞节收到我想要的礼物，我弟弟却没有 我本来想趁假期去旧金山玩，却遇到意想不到的意外（结果没有办法去）

谢谢，你们的回答很实用：）

XXXXX.yes,but XXXXX=XXXXX.却XXXXX

“却”表示转折