Using Can’t Have V3 and Couldn’t Have V3

Using Can’t Have V3 and Couldn’t Have V3

1. 1.Both of them are similar in meaning impossibility.
2. Couldn’tHaveV3 seems more formal than Can’t Have V3.
3. In writing, CouldNot HaveV3 is preferred generally.
4. When Couldn’tHave V3 is used as a past conditional, Can’t Have V3 can not be substituted in any way.