The paper examines the employment of modal auxiliaries by the speaker to indicate duty, permission, desire, or confidence to the audience in the social context of Martin Luther King's "I Have a Dream" speech to analyze the interpersonal function of public addresses.

Wenbo Zhao. Modal Auxiliaries and Interpersonal Functions in Martin Luther King’s “I Have a Dream”. Academic Journal of Humanities & Social Sciences (2021) Vol. 4, Issue 11: 11-17. https://doi.org/10.25236/AJHSS.2021.041103.

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