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Anonymous Posted 10 years ago
Vocabulary

foolish for/of

a) It is foolish for you to do that.
b) It is foolish of you to do that

Both (a) and (b) is grammatical, according to my grammar book. The parsing are as follows:

It is foolish / for you to do that.
(=For you to do that is foolish.)

It is foolish of you / to do that.
(=To do that was foolish of you.)

However, I don't know what kind of situations can have such nuanced sentences.
  

Top answer

The police detective promised the family of the victim that he would find the perpetrator of the crime and put him/her behind bars (put him/her in jail). It was foolish of the detective to make a promise he might not be able to keep. It was foolish for him to say that.

  • The police detective promised the family of the victim that he would find the perpetrator of the crime and put him/her behind bars (put him/her in jail).
  • It was foolish of the detective to make a promise he might not be able to keep.
  • It was foolish for him to say that.
  • Jack was so excited when he won $200 in the lottery, that he offered to buy a round of drinks for everyone in the bar .
  • It was foolish of him to do that.
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2 Answers
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The police detective promised the family of the victim that he would find the perpetrator of the crime and put him/her behind bars (put him/her in jail). It was foolish of the detective to make a promise he might not be able to keep. It was foolish for him to say that.

Jack was so excited when he won $200 in the lottery, that he offered to buy a round of drinks for everyone in the bar . I
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You put the phrase 'put him/her in jail' in brackets lest I should have ignorance of the idiom 'put sb behind bars'. Indeed, I know 'put sb in jail', not knowing 'put sb behind bars' You exactly know what a novice knows and doesn't know. I was covered in goose bumps from seeing your explanation given in brackets. You are absolutely the Englishmaven. Thank you for your input on this.

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