know better

phr

• ① 晓得不该做(…),不致于笨到(…)
  • I know better than to quarrel with my boss.我不致于笨到去跟老板争吵。
  • You should [ought to] know better.你应该知道那是不对的(你真白活了那么大的岁数)。
  • I should have known better than to trust him.我本来应当知道不该信任他。