Intonation in surprise depends on its degree: from mild surprise to astonishment.
1. High Fall expresses mild / affronted surprise, e.g.:
Look! It’s `stopped `raining! Oh `yes, so it `has!
He’s `broken a `leg! How `awful!
ֽDid you call him a liar? Good ֽheavans `no!
I’ve `just seen `John. Oh! `What!
A `young `woman `asks to ֽsee you! A `young ʌwoman!
3. In a conversation we can show surprise by repeating the other person’s words. In this case the intonation goes up, e.g.:
I’m af`raid you’ve `made a `mistake, sir. A mis ֽtake?
They `changed the `timetable. ֽChanged it?