单词有sure; certain; affirm; definite

中英文例句

她的回答是肯定的

Her answer is in the affirmative.

去不去，我们还不能肯定。

We are not sure yet whether we'll go or not.

我们肯定能按时完成任务。

　We can certainly have the job finished on time.

他肯定会来。

It's definite that he'll come.; He is sure to come.