当然的英语有很多，主要可以用of course，certainly，sure，no doubt ，assuredly 。如果能掌握这些常用的表达，那么相信对英语的学习与进步一定会有很大的帮助

of course

Of course there were lots of other interesting things at the exhibition.
当然，展览上还有很多其他有趣的展品。

certainly

The public is certainly getting tired of hearing about it.
关于此事，公众当然已经听腻了。

sure

He'd never been in a class before and he was not even sure that he should have been teaching.
他以前从未教过课，甚至不确定自己该不该教课。

no doubt

No doubt I had blundered again.
无疑，我又犯了一个愚蠢的错误。

assuredly  

He is, assuredly, not alone in believing they will win.
毫无疑问，不止他一个人认为他们会赢。