certainly是一个雅思常考词汇，这个词的常用解释为ad. 一定， 必定， 无疑； 当然， 行，这个词在很多英文原版小说中怎么应用呢，今天小编就带您了解一下。
在艾米利·勃朗特的《呼啸山庄》里，有这样的句子出现：
-- Certainly she had ways with her such as I never saw a child take up before; and she put all of us past our patience fifty times and oftener in a day: from the hour she came down stairs till the hour she went to bed, we had not a minute's security that she wouldn't be in mischief.
-- I certainly esteem myself a steady, reasonable kind of body,' she said; 'not exactly from living among the hills and seeing one set of faces, and one series of actions, from year's end to year's end; but I have undergone sharp discipline, which has taught me wisdom; and then, I have read more than you would fancy, Mr. Lockwood.
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