| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] have been [v-ing] the | 31 |
|
| 2 | which have been [v-ing] the | 29 |
|
| 3 | [Wh det] has been [v-ing] the | 22 |
|
| 4 | [Wh det] had been [v-ing] the | 9 |
|
