当然的英语有很多，主要可以用of course，certainly，sure，no doubt ，assuredly 。

相关介绍

of course

Ofcoursethere were lots of other interesting things at theexhibition.当然，展览上还有很多其他有趣的展品。

certainly

The public iscertainlygetting tired of hearing aboutit.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 evensurethat he should have beenteaching.他以前从未教过课，甚至不确定自己该不该教课。

no doubt

NodoubtI had blunderedagain.无疑，我又犯了一个愚蠢的错误。

assuredly

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