F-14:for certain 确定无疑地
A:How're you going to prepare for the test?
A:你想怎样复习来准备这场考试？
B:Well, I'm not going to learn the grammatical rules by heart.
B：嗯，我不会去背语法规则的。
A:But those are exactly the things I was going to do.
A：可这正是我要做的。
B:No, you don't have to do that. The teacher is going to examine the language skills, not language knowledge.
B：不，用不着。老师要考的是语言技巧，不是语言知识。
A:Are you sure?
A：你敢肯定？
B:I say this for certain.
B：绝对肯定。
