Spelled with "ee":
* Short words: see, me, she, he, we, be, tree, free, flee, sleep
* Longer words: deep, meet, feel, week, street, believe, greet, sleeve, keen, queen
Spelled with "ea":
* Short words: eat, tea, sea, bead, leap
* Longer words: read, reach, teach, dream, cream, clean, team, speak, peace
Spelled with "ie":
* Short words: lie, tie, pie
* Longer words: believe, relieve, chief, field, piece
Spelled with "ey":
* Short words: they, obey, key, grey
* Longer words: monkey, donkey, turkey, whey
Spelled with "ei":
* Short words: veil, reign
* Longer words: receive, seize, weird, neighbor
Other spellings:
* "y" at the end of a word: baby, happy, money, funny
* "e" at the end of a word: hope, rope, home, note
* "a" in some words: great, break, steak
This is not an exhaustive list, but it gives you a good starting point. There are many more words with the long e sound!