🆚What is the difference between "couldn't have done" and "mustn't have done" ? "couldn't have done" vs "mustn't have done" ? | HiNative
![Must vs. Have to | Must Not vs. Don't Have to • 7ESL | English language learning, English language teaching, English vocabulary words learning Must vs. Have to | Must Not vs. Don't Have to • 7ESL | English language learning, English language teaching, English vocabulary words learning](https://i.pinimg.com/originals/42/5e/f9/425ef94e162df94ce5844e3aef3b0de1.jpg)
Must vs. Have to | Must Not vs. Don't Have to • 7ESL | English language learning, English language teaching, English vocabulary words learning
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