校園英語口語習慣用語 第147期:have one's number

have one's number 對某人心中有數

【講解】

名詞number指的是“數量，總數”，have one's number 則指“對某人心中有數”，尤其指“對某人的能力或性格心中有數”。

【對話】

A:I was wondering if you could give me a day off.

A:你能不能給我一天假？

B:What for?

B:爲什麼？

A:I'll have to rewrite my thesis. That'll take much time.

A:我得重新寫論文，那要花很多時間。

B:Stop trying to fool me. I have your number.

B:別想糊弄我，我清楚你的底細。