[Grammar] You must not have called her

[wotcha]

1. You must have called her.

2. You should have called her.


Is 1 same in meaning with 2?

or, Is 2 grammatical and make sense?

 

[SoothingDave]

They do not mean the same thing.

 

[wotcha]

They do not mean the same thing.

Does Sentence 1 mean "I'm sure that you called her" ?

 

[SoothingDave]

Does Sentence 1 mean "I'm sure that you called her" ?

Yes. Something has led you to believe that he had indeed called her.

#2 is expressing that he did not call.

 

[5jj]

The title of the thread, "You must not have called her", is not very natural in BrE. If we are talking about the logical certainty of not calling, we normally express it as 'You can't have called her".