However hard he tried, he couldn't solve the math problem. （无论他多么努力尝试，他都无法解决这道数学题。）

She was very tired; however, she still kept working. （她非常疲惫；然而，她仍然继续工作。）

The weather was bad. However, we still went on a picnic. （天气很糟糕。

不过，我们还是去野餐了。）

He is very smart. However, he is a little lazy. （他很聪明。

然而，他有点懒。）

They had planned to go out. However, it started to rain heavily. （他们原本计划出去。

然而，天开始下大雨了。）

The book is expensive. However, it is really worth reading. （这本书很贵。

不过，它真的值得一读。）

I like all fruits. However, bananas are my favorite. （我喜欢所有的水果。

然而，香蕉是我的最爱。）

The task is difficult. However, we are confident to complete it. （这项任务很艰巨。

不过，我们有信心完成它。）

He runs fast. However, he didn't win the race this time. （他跑得很快。

然而，这次他没有赢得比赛。）

She has a lot of hobbies. However, painting is her top one. （她有很多爱好。

然而，画画是她最喜欢的。）

The movie received mixed reviews. However, I really enjoyed it. （这部电影评价不一。

不过，我真的很喜欢它。）

It was late at night. However, he was still awake thinking about the problem. （已经很晚了。

然而，他仍然醒着思考那个问题。）

They faced many difficulties. However, they never gave up. （他们面临很多困难。

然而，他们从未放弃。）

The dress looks beautiful. However, it doesn't fit me well. （这条裙子看起来很漂亮。

不过，它不太适合我。）

He studies hard. However, his grades haven't improved much yet. （他学习很努力。

然而，他的成绩还没有太大提高。）

The journey was long. However, the scenery along the way was amazing. （旅途很长。

不过，沿途的风景很棒。）

She can speak several languages. However, she wants to learn more. （她会说几种语言。

然而，她还想学习更多。）

The party was noisy. However, we had a great time there. （派对很吵。

不过，我们在那里玩得很开心。）

The job offers good pay. However, it requires a lot of overtime. （这份工作薪水不错。

然而，它需要经常加班。）

He is a good singer. However, he lacks stage experience. （他是个不错的歌手。

然而，他缺乏舞台经验。）