| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have been [verb] [verb] | 79 |
|
| 2 | could [vb infin] been [verb] [verb] | 79 |
|
| 3 | could have been [verb] [verb] | 78 |
|
| 4 | could [verb] been [vb pp] [verb] | 74 |
|
| 5 | could [verb] been [verb] [to-vb] | 58 |
|
| 6 | could [verb] been [verb] have | 17 |
|
| 7 | could [verb] been [verb] [vb past] | 13 |
|
| 8 | could [verb] been [verb] had | 13 |
|
| 9 | could [verb] been use [verb] | 13 |
|
| 10 | could [verb] been used [verb] | 13 |
|
| 11 | could [verb] been do [verb] | 8 |
|
| 12 | could [verb] been done [verb] | 7 |
|
| 13 | could [verb] been avoid [verb] | 6 |
|
| 14 | could [verb] been avoided [verb] | 6 |
|
| 15 | could [verb] been [v-ing] [verb] | 5 |
|
