| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they [verb] been [v-ing] for | 85 |
|
| 2 | [Wh det] they [verb] been [v-ing] | 59 |
|
| 3 | [Wh det] [verb] been [v-ing] for | 37 |
|
