当然可以用英文表达有：Certainly、Absolutely、Of course. certainly：adv.当然;肯定;无疑;确定;行。absolutely：adv.(强调真实无误)绝对地，完全地;绝对不;完全没有;极其。of course：adv.(尤用于赞同或不赞同某人时)当然；自然。
相关介绍：
We've certainly improved on last year's figures.
我们的业绩的确超过了去年的数字。
You've certainly made an excellent job of the kitchen.
你们把厨房弄得好极了。
Without treatment, she will almost certainly die.
要是不治疗，她十有八九会死。
The news was certainly a weight off my mind.
这个消息真是去掉了我心里的重担。
I'm certainly never going there again.
我肯定不会再去那里了。
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