Linked from
The 13 pages that link to Grammatical aspect, each with the reason it gives.
VerbRelated: Verb phrases distinguish ongoing, completed, habitual, and other event perspectives.
Auxiliary verbRelated: Auxiliaries help form progressive and perfect aspect in English.
Grammatical voiceRelated: Aspect combines with voice to shape the presentation of an event.
Tense–aspect–moodBroader topic: It describes event structure rather than locating an event in time.