were not born yesterdayとは 意味・読み方・使い方

動詞

to be born yesterday (past tense only)

1. (idiomatic, informal) To be new, naive, innocent, inexperienced, or easily deceived.

   I was not born yesterday, you know. I have done this before!

   • 2005, Howard Zinn and Donaldo Pereira Macedo, Howard Zinn on Democratic Education‎, page 69:

     If you don't know important things about history, then it's as if you were born yesterday.

   • 1998, Gwyn Hyman Rubio, Icy Sparks‎, page 155:

     "Compared to me, you were born yesterday."

使用する際の注意点

• Mostly used in the negative, to indicate that one is not as naive as had been implied, but sometimes, as in examples above, in comparison or the subjunctive mood.

同意語

• See also Wikisaurus:naive