在一段文章中，當我們想要表達相反的觀點或提出一種限制條件時，可以使用however。例如：”The sun is shining today. However, it is still quite cold outside.”（今天陽光燦爛，然而外面還是很冷。）這里的however表示盡管有陽光，但氣溫依然很低。

另外，however還可以用來對比兩個事物或情況。例如：”She is very talented. However, her lack of experience may hold her back.”（她非常有天賦，然而她缺乏經驗可能成為阻礙。）這里的however用來對比她的才華與經驗的不足。

當我們想要補充一些額外的信息或細節時，也可以使用however。例如：”The project was completed on time. However, there were some minor issues that needed to be addressed.”（項目按時完成。然而，還有一些小問題需要解決。）這里的however用來引入一些額外的細節。