Table. 1 The English tense–aspect system (adapted from Celce-Murcia and Larsen-Freeman (1999) and Larsen-Freeman and Celce-Murcia (2015)
Tense | Aspect | |||
|---|---|---|---|---|
Simple | Perfect | Progressive | Perfect progressive | |
(inflected) | have (inflected) + past participle | be (inflected) + ing form | have (inflected) + been + ing form | |
Present | walk/walks | has/have walked | am/is/are walking | has/have been walking |
Past | walked | had walked | was/were walking | had been walking |
Future | willa walk | will have walked | will be walking | will have been walking |