certainly
adv. 无疑，确定；当然，行（用于回答）
例句
I certainly don't deal drugs.
我当然不做毒品生意。
《柯林斯英汉双解大词典》
She certainly knows what's what.
她当然知道轻重缓急。
《牛津词典》
I'm certainly not scared of him.
我当然不怕他。
