| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [modal v] [verb] been | 707 |
|
| 2 | [num] [modal v] [verb] been | 135 |
|
| 3 | [num] which [modal v] [verb] | 59 |
|
| 4 | [num] which [verb] been | 38 |
|
