I wouldn’t ~

私なら~しないよ(仮定法過去)
ex) If I were you, I wouldn’t buy such a fancy car. →実際の会話ではわざわざIf節を言うことはあまりない。

Ex

  • I wouldn’t be so confident.
  • I wouldn’t do it.

Reference source

  • http://www.grammar-in-use.com/?p=413