![]() ![]() (we know it was IMPOSSIBLE for her to do it) The printer’s been broken for the past week, so she couldn’t have printed out the report.(we draw the conclusion that she did not do it) I don’t see the report here – she must not have printed it out.Here’s an example that illustrates the difference between must not have and couldn’t have: But Eric couldn’t have reached the cookies on the top shelf he must have asked his older brother to get them.Ĭan’t have is also possible, but it is much less common than couldn’t have. ![]()
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