| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they have been [v-ing] [prep] | 256 |
|
| 2 | [Wh det] have been [v-ing] [prep] | 195 |
|
| 3 | [Wh det] they have been [v-ing] | 59 |
|
| 4 | [Wh det] they have been [prep] | 8 |
|
