Try saying this tongue twister 5 times within 10 seconds. Start slow and then speed up after mastering the stresses for the words "ima'gine, ima'ginary, mena'gerie, ma'nager, ma'naging" As you speak each word correctly on the right syllable where the stress for the " ă " sound as in pat. "Can you imagine an imaginary menagerie manager managing an imaginary menagerie?" I hope it has helped you improve your accent .