• You use surely, especially in BrE, to show that you are almost certain about what you are saying and you want other people to agree with you. * surely 表示对所说的话几乎肯定无疑，并希望别人同意自己的看法，尤用于英式英语：◆Surely this can't be right? 这不可能是对的吧？ Surely in negative sentences shows that something surprises you and you do not want to believe it. 在否定句中，surely 表示某事使人感到吃惊而不愿相信：◆You're surely not thinking of going, are you? 你不是想走吧？
• Certainly usually means 'without doubt' or 'definitely', and is used to show that you strongly believe something or to emphasize that something is really true. * certainly 常指无疑地、确定地，用以表示坚信某事或强调某事属实：◆I'll certainly remember this trip! 我绝不会忘记这次旅行！In informal NAmE this would be 非正式的美式英语说法为：◆I'll sure remember this trip! 我绝不会忘记这次旅行！
• Compare 比较：◆The meal was certainly too expensive(= there is no doubt about it). 这顿饭的确太贵了（毫无疑问）。and 和：◆The meal was surely too expensive?(= that is my opinion. Don't you agree?) 这顿饭太贵了吧？（我这样认为，你不这样认为吗？）
• In formal language only, surely can be used to mean 'without doubt'. 只有在正式用语中，surely 才表示无疑：◆This will surely end in disaster. 这无疑将以灾难告终。

Conceding a point and making a counter-argument 承认一个观点的正确性，并提出一个对立的观点

• ◆ While the film is undoubtedly too long, it is nevertheless an intriguing piece of cinema. 虽然这部电影的确太长了，但它不失为一部有趣的影片。
• ◆ It can be argued that the movie is too long. It is nonetheless an intriguing piece of cinema. 可以认为这部电影太长了，但它不失为一部有趣的影片。
• ◆The film is undoubtedly too long. Still, it is an intriguing piece of cinema. 这部电影的确太长了，但它仍不失为一部有趣的影片。
• ◆ Of course, huge chunks of the book have been sacrificed in order to make a two-hour movie, but it is nevertheless a successful piece of storytelling. 当然，为了制作一部两小时的电影，该书中的大部分内容都被舍弃了，不过它仍不失为一部成功的故事片。
• ◆Critics are wrong to argue that the film's plot is too complicated. Certainly there are a couple of major twists, but audiences will have no difficulty following them. 批评家认为这部电影的情节过于复杂，这种观点是不恰当的。影片中确实有几次大的情节变化，但观众还是不难看懂的。
• ◆ It is true that you cannot make a good movie without a good script, but it is equally true that a talented director can make a good script into an excellent film. 的确，没有好的剧本不可能拍出好的电影，但有天赋的导演能将较好的剧本制作成非常好的电影，这一点也是没有疑问的。
• ◆ It remains to be seen whether these two movies herald a new era of westerns, but there is no doubt that they represent welcome additions to the genre. 这两部电影是否预示着西部片新时代的来临还有待观察。但是毫无疑问，它们作为这一电影类型的新作而受到欢迎。