Couldn't have什麼意思

"Couldn't have" is a contraction that means "could not have." It is used to express a lack of ability or possibility in the past. Here are some examples of how it might be used in a sentence:

  1. "I couldn't have done it without your help." (I was not able to do it without your help.)
  2. "The team couldn't have won the championship without strong teamwork." (The team was not able to win the championship without strong teamwork.)
  3. "The experiment couldn't have gone better." (The experiment did not go better.)
  4. "She couldn't have been more pleased with the outcome." (She was not more pleased with the outcome.)

In each of these examples, "couldn't have" is used to express a past situation where something was not possible or did not happen.