| Form | Example | |
|---|---|---|
| 12 combinations | 3 times × 4 aspects: simple/cont/perf/perf-cont | She has lived here all her life. (permanent) |
| Style choices | historical present, future-in-past, used to/would | I have read three books this week. (count) |
| Reported tense | backshift unless universal truth / very recent | She knew the answer. (state) |
| Aspect | simple = state / count · continuous = activity / duration | She has been living here for years. (duration emphasis) |