老外最常用的英文短語(MP3+中英字幕) 第291期:know for sure

釋義：

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know for sure 明確知道

這是在表不很明確地知道某事時用到的表達。可以單獨使用爲 know for sure,也可以使用 know for sure 主語+動詞的形態。沒有自信時，經常會用作否定形式。

例句：

All we know for sure is that he seems to hate Liz as much as I do.
我們都知道，他像我恨莉斯一樣恨她。
I think she might be a lesbian but I don't know for sure.
我覺得她是個同性戀，不過不太肯定。
She only suspects something. She doesn't know for sure.
她只是在懷疑斷麼，不過她也不太確定。

對話：

A: I know for sure I'll become a lawyer.
我敢肯定我能成爲一個律師。
B: You'll have to study really hard.
你得努力學習了。