4 points
They work like an e after a vowel, making it a long vowel, but with a letter in between. They have absolutely no reason to exist as haet is pronounced the same as hate but has the letters in a more logical order.
0 points
1 point
2 points
No. ˈhē-mə-ˌglō-bən https://www.merriam-webster.com/dictionary/hemoglobin#medicalDictionary