[1][2] Her research in formal semantics addresses phenomena including modality, tense, aspect, pronouns and indefinites.
[3] Arregui graduated from UMass Amherst in 2005 with a dissertation titled "On the accessibility of possible worlds: the role of tense and aspect".
[4] Arregui joined UMass Amherst in 2019 as faculty in semantics.
In 2023, Arregui was Co-Director of the Linguistic Society of America Summer Institute along with Kyle Johnson.
[6][7][8] In 2024, Arregui was inducted as a Fellow of the Linguistic Society of America.