學個句子：＂I wasn't born yesterday＂

In English, if you want to tell someone that they haven't made you believe an obvious lie, you can say "I wasn't born yesterday" to show that you are not easily fooled.  

Here are some examples:

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A: Did you know that I was the third man on the moon?

B: I wasn't born yesterday. You're British and I know that no British people have walked on the moon.

A: (Radio advert) Learn Russian in 3 days with just one minute's study an hour!

B: Those adverts are so stupid! The only way to learn a language is years of hard study and practice. I wasn't born yesterday.

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＂I wasn't born yesterday＂我不是昨天才出生，我不是三歲小孩，別騙我了！

BBC learning English