| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which have been [verb] [noun prp] | 7 |
|
| 2 | [Wh det] have been [v-ing] [noun prp] | 6 |
|
| 3 | [Wh det] has been [verb] [noun prp] | 6 |
|
