References

 

BBC Learning English. (2005). learning English. Retrieved from BBC wolrd service: http://downloads.bbc.co.uk/worldservice/learningenglish/pronunciation/pdf/exercises/schwa_exercises.pdf

English, R. l. (n.d.). Really learn English. Retrieved from Really learn English: https://www.really-learn-english.com/english-pronunciation-lesson-25-s-and-z-sounds.html

Jakub Marian. (April de 2021). Retrieved from Pronunciation errors: https://jakubmarian.com/common-pronunciation-errors-in-english/

PESCE, C. (2017). busy teacher. Retrieved from 7 Worst Pronunciation Mistakes ESL Students Make Around the World: https://busyteacher.org/14846-7-worst-pronunciation-mistakes-esl-students-make.html

TARPLEY, Y. G. (April de 2021). FluentU.com. Retrieved from  How to Improve Your English Pronunciation: https://www.fluentu.com/blog/english/how-to-improve-english-pronunciation/