| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have been [verb] for | 67 |
|
| 2 | could have been [vb pp] for | 58 |
|
| 3 | could have been forgiven for | 14 |
|
| 4 | could have been forgive for | 14 |
|
| 5 | could have been [v-ing] for | 9 |
|
| 6 | could have been used for | 6 |
|
| 7 | could have been use for | 6 |
|
