The perfect, the progressive, and the perfect progressive are three of the aspect-like forms used in English. The perfective, imperfective, completive, inceptive, punctual, iterative, and habitual are sometimes considered aspects in English as well. Thomas, Payne Edward (1997). Describing morphosyntax: a guide for field linguists. Cambridge University Press. pp. 238–241. ISBN9780521588058.
Jeanette S. DeCarrico (December 1986). "Tense, Aspect, and Time in the English Modality System". TESOL Quarterly. 20 (4): 665–682. doi:10.2307/3586517. JSTOR3586517.
Jeanette S. DeCarrico (December 1986). "Tense, Aspect, and Time in the English Modality System". TESOL Quarterly. 20 (4): 665–682. doi:10.2307/3586517. JSTOR3586517.