Error Patterns: Using just /e/, or vowel /ɛ/. Name will sound like nem.
How to Correct: Make sure you can hear the difference. Use minimal pairs:
/eɪ/ vs. /ɛ/
Hold the /eɪ/ longer - let your mouth relax and your jaw close slightly at the end
Practice Steps: Practice on common words: day, today, say, stay, wait, name, gain, state
More Resources for this topic: Vowel eɪ video (below): https://youtu.be/BeWnbfgRzt0
Website help for vowels: https://www.speechmodification.com/free/category/vowels