| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [verb] been [vb pp] [prep] | 509 |
|
| 2 | could [verb] been [vb pp] [prep] | 509 |
|
| 3 | [modal v] [verb] been [vb pp] of | 55 |
|
| 4 | [vb mod] [verb] been [vb pp] of | 55 |
|
| 5 | could [verb] been [verb] of | 14 |
|
| 6 | could [verb] be [vb pp] of | 13 |
|
| 7 | could [verb] been [vb pp] of | 13 |
|
| 8 | could [verb] [be] [vb pp] of | 13 |
|
| 9 | could [verb] been [vb pp] of | 13 |
|
| 10 | could [verb] [been] [vb pp] of | 13 |
|
